Vitamin D Deficiency

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Information
Disease name
Vitamin D Deficiency
Disease ID
Description
Disease area statistics
[No Data.]
Chromosome band
[No Data.]
Annotation
Genes Mutation Description Source Links
NCT ID Status Phase Summary Start date Completion date
NCT05050916 Active, not recruiting Phase 1/Phase 2 The Investigation of Vitamin D and Menstrual Cycles Trial, the inVitD Trial: A Phase II Randomized Trial March 17, 2023 November 30, 2024
NCT06315452 Active, not recruiting FREQUENCY OF VITAMIN D DEFICIENCY IN PREMATURE NEWBORN BORN BEFORE 32 WEEKS AND/OR WITH A BIRTH WEIGHT UNDER 1500g February 1, 2022 June 1, 2024
NCT06054919 Active, not recruiting Phase 2/Phase 3 The Effect of Vitamin D3 Therapy on Vitamin D Status in Pregnant Women With Vitamin D Deficient and Insufficient April 1, 2021 November 30, 2023
NCT04170348 Active, not recruiting Phase 2 Daily Vitamin D for Sickle-cell Respiratory Complications September 15, 2020 February 28, 2025
NCT06338059 Active, not recruiting Relationship Between Vitamin D and Vitamin B12 Levels and Neuropathic Pain in Lipedema March 1, 2024 June 1, 2024
NCT00748618 Active, not recruiting N/A Vitamin D Replacement After Kidney Transplant October 2008 June 2023
NCT03613116 Active, not recruiting Phase 2 High-dose Vitamin D Supplements in Older Adults March 18, 2019 December 31, 2024
NCT03018132 Active, not recruiting N/A Preeclampsia Research on Vitamin D, Inflammation, & Depression April 1, 2017 July 2025
NCT05997199 Active, not recruiting The Effect Vitamin D on the Recovery Rate of Bell Palsy June 1, 2023 September 15, 2023
NCT06406543 Active, not recruiting N/A Vitamin D in Armenia: Vitamin D Repletion Strategies With Dibase, and Vitamin D and Vitamin D Binding Protein and COVID December 1, 2023 December 31, 2024
NCT05559112 Active, not recruiting N/A Effects of Vitamin D-Enriched Mushrooms on Vitamin D Status and Immune Function and Inflammatory Status in Adults December 5, 2022 April 2024
NCT05329428 Active, not recruiting N/A PREDIN: Pregnancy and Vitamin D Intervention Study April 14, 2022 December 31, 2024
NCT06452082 Active, not recruiting Retrospective Observational Study on the Risk in Developing Long-COVID Syndrome and in Contracting SARS-CoV-2 Infection After COVID-19 Vaccination in Relation to Vitamin D3 Supplementation March 20, 2024 March 2027
NCT02553447 Active, not recruiting N/A Cholecalciferol in Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency October 19, 2015 March 24, 2025
NCT04482673 Active, not recruiting Phase 4 Vitamin D Supplementation in the Prevention and Mitigation of COVID-19 Infection July 31, 2020 December 31, 2023
NCT00473239 Completed N/A The Pharmacokinetics of a Single Large Dose of Vitamin D3 October 2006 March 2007
NCT00473317 Completed N/A Sunlight Exposures Effect on Serum Vitamin D Levels July 2007 September 2007
NCT00491322 Completed N/A Vitamin D Deficiency, Insulin Resistance and FGF-23 May 2006 February 2008
NCT00494104 Completed N/A Prevention of Vitamin D Deficiency September 2006 September 2011
NCT00497900 Completed Phase 4 The Effect of Calcium and Vitamin D in Patients With Heart Failure August 2007 December 2011
NCT00581828 Completed Phase 4 Does Treatment of Hypovitaminosis D Increase Calcium Absorption? January 2005 December 2008
NCT00610688 Completed Phase 3 Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants January 2008 April 2012
NCT00674154 Completed Phase 2/Phase 3 Effect of Vitamin D Treatment in Primary Hyperparathyroidism May 2008 August 2013
NCT00681590 Completed Phase 3 Safety of Vitamin D Supplementation in Older Persons April 2008 April 2009
NCT00682214 Completed Phase 1 Cholecalciferol Supplementation, Muscle Strength May 2008 June 2009
NCT00685971 Completed N/A Cholecalciferol for Vitamin D in Adult Cystic Fibrosis (CF) Patients December 2008 July 2013
NCT00690417 Completed N/A Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation August 2007 August 2011
NCT00692120 Completed N/A Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy February 2007 November 2008
NCT00697294 Completed N/A Impact of Vitamin D Status on Bones in Breastfed Infants July 2008 November 2011
NCT00723385 Completed N/A Effects of Vitamin D on Lipids July 2008 July 2012
NCT00736632 Completed N/A Vitamin D, Insulin Resistance, and Cardiovascular Disease May 2006 January 13, 2019
NCT00742235 Completed N/A hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects July 2007 January 2012
NCT00743574 Completed N/A Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome) August 2008 February 2013
NCT00749541 Completed Vitamin d Levels and Coronary Catheterization November 2008 August 2009
NCT00749918 Completed N/A Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism January 2007 June 2008
NCT00752102 Completed Phase 4 Vitamin D and Coronary Calcification Study September 2008 October 2013
NCT00756899 Completed Vitamin D Deficiency and Low Bone Mineral Content in Children July 2008 May 2012
NCT00780247 Completed Environmental Influences on Vitamin D Status July 2008 August 2008
NCT00789503 Completed Phase 1/Phase 2 Nursing-Home Residents Given Bread Fortified With Vitamin D3 November 2004 December 2005
NCT00850694 Completed Vitamin D Deficiency in Obese Adolescent Girls and Influence of Vitamin D on Insulin Secretion and Sensitivity February 2007 October 2010
NCT00851396 Completed Assessment of Influence of Vitamin D on Insulin Secretion and Sensitivity in Obese Teenage Girls April 2008 October 2010
NCT00882401 Completed Phase 4 Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation April 2009 October 2010
NCT00882505 Completed N/A Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial. April 2009 August 2010
NCT00886379 Completed Phase 2 Blue Sky Study: Impact of Milk and Vitamin D for Child Growth and Health January 2009 March 2009
NCT00893451 Completed N/A Study of Vitamin D3 Supplementation in Patients With Chronic Kidney Disease September 2009 June 2011
NCT00909454 Completed N/A Vitamin D Supplement Study for Adolescents February 2009 June 2009
NCT00921622 Completed Phase 2 Vitamin Deficiency and Blood Pressure in Hospitalized Jewish General Hospital (JGH) Patients June 2009 June 2011
NCT00933244 Completed Phase 4 Treatment of Vitamin D Insufficiency April 2010 August 2014
NCT00948298 Completed N/A Effect of Vitamin D3 on Vascular Function July 2009 August 2012
NCT00957879 Completed N/A Different Vitamin D Preparations & FGF23 in Humans May 2009 March 2011
NCT00968877 Completed Phase 3 Vitamin D and Chronic Renal Insufficiency September 2009 January 2011
NCT01004354 Completed N/A Vitamin D Supplementation in Psychiatric Illnesses June 2009 June 2010
NCT01013584 Completed N/A The Effect of Weight on Vitamin D Dose Response November 2009 July 2011
NCT01016184 Completed Phase 4 Influence of Vitamin D Treatment on Multi-systemic Functions in Young Men With Vitamin D Deficiency Due to Work Conditions September 2009 March 2012
NCT01024777 Completed Phase 1 Safety and Immunologic Effect of Low Dose Versus High Dose Vitamin D3 in Multiple Sclerosis March 2010 January 2013
NCT01025128 Completed Phase 4 Vitamin D Status in Males in Jerusalem Area and Its Correlation to Parathyroid Hormone (PTH) Level and Bone Mineral Density January 2010 July 2014
NCT01037140 Completed Phase 4 Effects of Vitamin D Supplementation in Obesity January 2010 July 2012
NCT01508845 Completed N/A A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption January 2012 June 2013
NCT00092079 Completed Phase 3 A Study of MK0217A and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227) January 2004 November 2004
NCT00204919 Completed N/A Vitamin D Administration in the Nursing Home June 2001 November 2004
NCT00242476 Completed Phase 2 A Study to Assess the Effectiveness of an Investigational Drug in Elderly Subjects With Low Vitamin D Levels (0822A-009) September 2005 July 2006
NCT00267540 Completed N/A The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls January 2001 December 2003
NCT00273611 Completed N/A Vitamin D Levels and Vitamin D Education in Geriatric Patients December 2005 May 2006
NCT00288873 Completed Phase 4 Characterization of Hyperparathyroidism and Vitamin D Deficiency in Obesity February 2006 July 2007
NCT00292591 Completed Phase 3 Evaluation of Vitamin D Requirements During Pregnancy January 2004 January 2010
NCT00327847 Completed N/A Optimizing Vitamin D Nutrition in Healthy Adults December 2004 December 2006
NCT00374595 Completed Vascular Risk After Kidney Transplantation April 2006 June 20, 2023
NCT00381914 Completed Phase 2 Vitamin D Dose-Response Study to Establish Dietary Requirements in Infants March 2007 December 2011
NCT00412074 Completed Phase 3 Establishing the Vitamin D Requirements During Lactation August 2006 October 2012
NCT00412087 Completed Phase 3 Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina January 2007 July 2009
NCT00415402 Completed N/A Effect of Vitamin D Supplementation on Health of Low Birth Weight Infants March 2007 July 2010
NCT00427037 Completed N/A Cholecalciferol (Vitamin D3) Therapy in Chronic Kidney Disease (CKD) Subjects December 2005 March 2013
NCT02713009 Completed N/A Impact of Maternal Body Weight on Vitamin D Status During Pregnancy November 2015 March 2018
NCT02714361 Completed N/A A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women September 2015 April 2016
NCT02735200 Completed Phase 2 Topical Delivery of Vitamin D3 as Vitamin D Supplementation April 2016 December 30, 2016
NCT02750293 Completed Phase 3 The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors June 2015 September 2017
NCT02783924 Completed Phase 2 The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach October 2014 May 2018
NCT02876315 Completed N/A The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults December 2016 December 2019
NCT02881957 Completed Phase 2/Phase 3 Hypovitaminosis D in Neurocritical Patients October 10, 2016 October 10, 2018
NCT02904720 Completed Prevalence and Consequences of Vitamin D Deficiency in Pregnant Women in Switzerland October 2015 February 2016
NCT02906319 Completed Vitamin D and HbA1c Levels in Diabetic Patients With CKD September 2015 July 2016
NCT02922803 Completed N/A Vitamin D and Physical Performance Before and After Intervention and Birth Outcome in Pregnant Somali and Swedish Women May 2010 August 2016
NCT02930434 Completed N/A Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants October 2016 March 1, 2018
NCT02941185 Completed Phase 4 Multi-dose Vitamin D Supplementation in Preterm Infants January 2014 December 2016
NCT02956408 Completed N/A Efficacy of Vitamin D Supplementation in Obese Children November 30, 2016 October 30, 2019
NCT03021629 Completed Comparison of Vitamin D Status and Vitamin D Receptor Polymorphisms in Patients With High Myopia and Primary Open-angle Glaucoma July 2013 December 2016
NCT03032328 Completed N/A Vitamin D Deficiency and Dysautonomia June 2016 December 21, 2022
NCT03035084 Completed Phase 4 Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena? February 15, 2017 November 20, 2017
NCT03038516 Completed Phase 2 'Palliative-D' Vitamin D to Palliative Cancer Patients November 1, 2017 June 9, 2020
NCT03070483 Completed Phase 2 Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study March 25, 2018 November 1, 2018
NCT03073720 Completed Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers July 26, 2017 December 31, 2019
NCT03087149 Completed N/A Monitored vs Standard Supplementation of Vitamin D in Preterm Infants May 1, 2017 March 31, 2020
NCT03096314 Completed Phase 3 Vitamin D to Improve Outcomes by Leveraging Early Treatment April 27, 2017 December 11, 2018
NCT03099759 Completed N/A Vitamin D Raising and Maintaining Blood Serum 25(OH)D3 Levels June 27, 2016 May 31, 2017
NCT03101150 Completed Phase 1/Phase 2 Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia October 1, 2012 December 31, 2015
NCT03134417 Completed N/A Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes February 1, 2016 June 1, 2021
NCT03141593 Completed Phase 4 Oral Vitamin D Substitution Weekly or Monthly and Adherence October 9, 2017 October 31, 2018
NCT03144128 Completed N/A Vitamin D for Muscle Metabolic Function in Cancer Cachexia May 23, 2018 September 13, 2018
NCT03151174 Completed Early Phase 1 Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes April 29, 2017 June 1, 2018
NCT03176849 Completed Phase 4 A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT November 1, 2017 July 1, 2019
NCT03193944 Completed Phase 2 Vitamin D Supplementation on Metabolic Syndrome Indicators Among Older Adults, Alborz Province, Iran February 10, 2017 July 10, 2017
NCT03203382 Completed Corneal Nerve Structure in Sjogren's September 2015 April 2017
NCT03213886 Completed Phase 4 The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture: January 1, 2018 July 30, 2020
NCT03221972 Completed Vitamin D of Chinese Children and Adolescents January 1, 2010 October 30, 2016
NCT03233295 Completed Phase 4 A Prospective, Single-centre, Open-label Study to Confirm the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency October 23, 2014 August 27, 2016
NCT03234218 Completed Vitamin D Levels in Liver Transplantation Recipients Prospective Observational Study September 2016 September 2017
NCT03253055 Completed The D-BIICEP Study February 1, 2018 July 1, 2018
NCT03258086 Completed N/A Vitamin D in Diabetic Children November 1, 2016 September 2017
NCT03264625 Completed Phase 2 The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis September 30, 2017 July 30, 2021
NCT03273725 Completed Maternal Vitamin D Levels in Pregnancy and Dental Caries in Children June 2016 August 2017
NCT03284840 Completed Adults Nutrition as a Protective or Health-risk Factor June 1, 2017 December 31, 2018
NCT03304795 Completed Vitamin D Deficiency Still Growing January 1, 2008 December 31, 2014
NCT03305510 Completed Vitamin D Deficiency of Couples and Infertility March 1, 2016 June 1, 2017
NCT03310242 Completed N/A Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels June 1, 2015 November 30, 2015
NCT03310307 Completed Phase 2 Vitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive Women April 1, 2016 October 30, 2016
NCT03318029 Completed N/A Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study) October 1, 2016 September 25, 2017
NCT03330301 Completed D-tecting Disease - From Exposure to Vitamin D During Critical Periods of Life April 1, 2012 September 30, 2016
NCT03333564 Completed N/A Effect of Vitamin D3 and Omega-3FA on Estradiol November 2016 February 2017
NCT03334136 Completed N/A The Effect of Vitamin D Supplementation on Psoriasis Severity November 24, 2017 May 13, 2019
NCT03339427 Completed N/A Intervention Study of Vitamin D Supplementation to Prevent Cardiovascular Disease June 2014 June 2015
NCT03342651 Completed N/A Preoperative Vitamin D Levels and Respiratory Complications of General Anesthesia April 1, 2015 December 31, 2016
NCT03344718 Completed Metabolic Syndrome and Vitamin D Level in Old People July 30, 2012 August 17, 2012
NCT03349879 Completed Familial Clustering of Vitamin D Deficiency Via Shared Environment: The Korean National Health And Nutrition Examination Survey 2008-2012 January 1, 2008 December 31, 2012
NCT03376490 Completed Study of the Association of Muscle Strength, Balance and Other Factors With Vitamin Levels Among Elderly Diabetics January 1, 2012 August 31, 2014
NCT03385356 Completed Phase 4 Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis December 19, 2017 April 30, 2018
NCT03395171 Completed N/A Vitamin D3 Supplementation and Stress Fracture Occurrence in High-Risk Collegiate Athletes November 30, 2015 July 1, 2016
NCT03401541 Completed Early Phase 1 25-Hydroxyvitamin D Pharmacokinetic Study October 1, 2018 November 1, 2019
NCT03402698 Completed N/A Vitamin D Supplementation in Children January 9, 2018 May 26, 2018
NCT03403647 Completed N/A Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients July 15, 2018 April 10, 2019
NCT03420378 Completed N/A Central Sensitization in Vitamin D Deficiency January 28, 2018 December 19, 2018
NCT03437421 Completed N/A Myocardial Function and Vitamin D Supplementation in Diabetes. February 4, 2018 November 19, 2023
NCT03463642 Completed N/A The Efficacy of Different Vitamin D Supplementation Delivery Methods February 2, 2017 April 4, 2017
NCT03490448 Completed N/A The Changes of Body Composition, Glucolipid Metabolism and Bone Metabolism in Obese Children After Weight Loss July 6, 2014 August 16, 2014
NCT03536845 Completed Phase 3 Vitamin D Supplementation to Prevent Vitamin D Deficiency for Children With Epilepsy January 1, 2018 August 1, 2021
NCT03544671 Completed N/A Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age. September 15, 2016 December 21, 2017
NCT03584256 Completed Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time April 5, 2018 April 6, 2018
NCT03602430 Completed Phase 2/Phase 3 Cholecalciferol on Hemodialysis Patients July 1, 2018 September 28, 2018
NCT03608488 Completed N/A The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women August 6, 2018 July 12, 2019
NCT03609970 Completed N/A Vitamin D and Immunity: Photosynthesis Versus Supplementation November 19, 2015 April 14, 2017
NCT03639584 Completed Prevalence of Deficiency of Vitamin D in Critically Ill Patients August 23, 2018 November 30, 2020
NCT03644212 Completed Phase 4 Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS July 2012 October 2013
NCT03648528 Completed Phase 4 Cholecalciferol Supplementation Effect on Parathyroid Hormone in Hemodialysis Patients October 15, 2015 May 2018
NCT03649802 Completed Phase 2 Vitamin D and Arterial Stiffness in Elderly August 16, 2018 December 31, 2021
NCT03683238 Completed Nutritional Status and Hidradenitis Suppurativa (Acne Inversa) May 2015 May 2018
NCT03686150 Completed N/A Vitamin D Oral Replacement in Asthma January 30, 2019 September 30, 2021
NCT03734250 Completed D Vitamin Effects on Neuromuscular Blocker Reverse Time November 1, 2014 March 1, 2018
NCT03735303 Completed N/A Effect of Vitamin D3 and Omega-3FA on Leptin and HbA1C With Vitamin D Deficiency December 1, 2018 June 1, 2019
NCT03773809 Completed N/A Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients August 1, 2017 August 31, 2018
NCT03782805 Completed N/A Effect of Vitamin D Supplementation on Inflammatory Markers May 9, 2018 July 9, 2018
NCT03783273 Completed N/A The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3 January 8, 2019 May 26, 2020
NCT03810261 Completed N/A Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2 January 8, 2019 April 2, 2019
NCT03813927 Completed N/A Vitamin D Treatment of Diabetic Patients With Foot Ulcers April 1, 2016 July 3, 2018
NCT03820895 Completed Vitamin D Levels in Adolescent Idiopathic Scoliosis October 1, 2016 January 10, 2019
NCT03871868 Completed Vitamin D Levels And Myoma Uteri December 1, 2018 March 1, 2019
NCT03873935 Completed Vitamin D in Periodontal and Cardiovascular Disease Progression January 2, 2015 February 5, 2019
NCT03890458 Completed Phase 4 The Effect of Vitamin D on Fertility May 1, 2017 November 30, 2017
NCT03894735 Completed Vitamin D in Ectopic Pregnancies October 1, 2015 June 1, 2017
NCT03919812 Completed N/A Immunomodulatory Vitamin D in Thalassemia April 1, 2018 August 15, 2018
NCT03920150 Completed Phase 3 Vitamin D 24'000 IU for Oral Intermittent Supplementation September 30, 2019 May 31, 2020
NCT03986268 Completed N/A Vitamin D Can Increase Pathological Response of the Breast Cancer Patients Treated With Neoadjuvant Therapy May 10, 2019 December 10, 2020
NCT04005573 Completed N/A The Combined Effect of Omega-3 Fatty Acid and Vitamin D3 on Lipid Profile Levels and Oxidized Low Density Lipoprotein July 10, 2019 January 1, 2020
NCT04005612 Completed N/A Effect of Vitamin d and Omega 3 on Osteocalcin November 1, 2019 February 1, 2020
NCT04010942 Completed Phase 4 Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant Women April 1, 2018 March 30, 2019
NCT04030182 Completed Vitamin D Deficit in Women With Uterine Fibroids December 1, 2019 October 9, 2021
NCT04033796 Completed N/A Vitamin D Supplementation D_SAF Pilot Study December 1, 2014 June 10, 2016
NCT04038853 Completed Phase 4 Vitamin D in Fatty Liver Disease December 1, 2015 April 1, 2019
NCT04066842 Completed Vitamin D in Systemic Sclerosis Patients With Periodontitis November 1, 2015 May 30, 2019
NCT04117581 Completed N/A A Study to Investigate the Effect of Vitamin D3 Supplementation on Asthma Symptoms in Adults With Asthma (VITDAS) October 28, 2019 April 1, 2022
NCT04156074 Completed N/A Innovative Food Structures to Enhance Nutrient Bioavailability November 4, 2019 December 31, 2021
NCT04183257 Completed Phase 4 Effect of Escalating Oral Vitamin D Replacement on HOMA-IR in Vitamin D Deficient Type 2 Diabetics September 30, 2016 July 30, 2017
NCT04204304 Completed N/A Relationship Between Serum Vitamin D Levels and Musculoskeletal Adverse Effects in Patients Using Isotretinoin March 15, 2019 October 1, 2019
NCT04207294 Completed N/A Vitamin D Enriched Meat Project (Acute Study) January 16, 2020 April 10, 2020
NCT04209231 Completed Effect of Vitamin D on Periodontal Disease November 2015 April 2016
NCT04276649 Completed A Retrospective Analysis: the Influence of Caltrate Supplement on the Effect of Mesalazine in Ulcerative Colitis January 1, 2015 March 31, 2021
NCT04291833 Completed N/A Prospective, Assessment of Vitamin D and Calcium Supplementation, Improvement of Nutritional Status and Preoperative Rehabilitation in Patients Before Knee Arthroplasty. January 1, 2015 December 31, 2017
NCT04292873 Completed N/A Effects of Enteral Supplement Vitamin D Incritically Ill Patients March 16, 2020 March 31, 2023
NCT04307784 Completed N/A The Effects of Vitamin D3 Alone and in a Combination With Omega-3 on the Association of C-peptide With Glycemic Control March 10, 2020 June 30, 2020
NCT04319289 Completed N/A Effect of Aerobic Interval Training With Vitamin D Supplement on Functional Capacity and Perceived Myalgia January 12, 2020 May 20, 2020
NCT04323852 Completed Phase 4 Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery? September 1, 2017 January 21, 2019
NCT04324853 Completed Helminth Infection During Pregnancy on Vitamin D Regulation: HELMVIT Study January 28, 2019 December 31, 2022
NCT04359524 Completed N/A Vitamin D Supplementation in Conscripts October 1, 2016 April 25, 2017
NCT04377386 Completed N/A Efficacy of Oral Vitamin D Supplementation in Adolescents and Young Adults. August 3, 2020 February 2, 2021
NCT04377399 Completed Phase 4 High vs Low Dose Vitamin D in Patients With Diabetic Peripheral Neuropathy January 10, 2018 January 25, 2020
NCT04386044 Completed Investigating the Role of Vitamin D in the Morbidity of COVID-19 Patients June 1, 2020 September 8, 2020
NCT04405141 Completed Uroflowmetry Results and Vitamin D Levels January 1, 2017 December 30, 2017
NCT04407286 Completed Phase 1 Vitamin D Testing and Treatment for COVID 19 May 19, 2020 November 30, 2020
NCT04407572 Completed Evaluation of the Relationship Between Zinc Vitamin D and b12 Levels in the Covid-19 Positive Pregnant Women April 20, 2020 June 14, 2020
NCT04450199 Completed Early Phase 1 Does Supplementing Vitamin D Deficiency Affect Fusion Healing Rates in Elective Foot and Ankle Surgery? July 24, 2020 March 11, 2024
NCT04461665 Completed N/A Effects of Vitamin D Supplementation on Immune Function in Infants August 18, 2015 December 30, 2016
NCT04469257 Completed N/A SUN LIGHT EXPOSURE AND VITAMIN D LEVEL IN NURSING HOME June 27, 2018 August 1, 2018
NCT04476511 Completed Phase 3 The Efficacy and the Safety of Vitamin D3 30,000 IU for Loading Dose Schedules September 5, 2018 December 15, 2021
NCT04482465 Completed N/A Omega 3 and Vitamin D Dosage in a Population With Moderate to High Risk of AMD April 20, 2017 October 5, 2017
NCT04525820 Completed N/A High Dose Vitamin-D Substitution in Patients With COVID-19: a Randomized Controlled, Multi Center Study December 15, 2020 November 30, 2021
NCT04606017 Completed Effect of Vitamin D Supplementation on Infliximab Response in Patients With Crohn's Disease January 1, 2014 June 1, 2020
NCT04621500 Completed Phase 2 Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans June 4, 2019 February 4, 2022
NCT04628000 Completed Baseline Vitamin D Deficiency and COVID-19 Disease Severity October 27, 2020 April 14, 2022
NCT04637880 Completed 25- Hydroxyvitamin D Levels in Pregnancy and Effects on Pregnancy Related Disorders July 2012 July 1, 2018
NCT04652544 Completed Phase 3 Vitamin D Supplementation in Individuals With a Chronic Spinal Cord Injury May 19, 2021 January 23, 2024
NCT04687527 Completed Vitamin D Levels and Postoperative Pain in Laparoscopic Cholecystectomy May 15, 2020 April 30, 2021
NCT04694976 Completed Vitamin D Status in Children With Sickle Cell Disease Living in Lyon, France February 4, 2021 February 3, 2022
NCT04735926 Completed Phase 2/Phase 3 Efficacy and Safety of Calcifediol vs Placebo in Subjects With Vitamin D Deficiency December 23, 2020 April 25, 2023
NCT04738760 Completed Clinical Outcomes of High Dose Vitamin D Versus Standard Dose in COVID-19 Egyptian Patients December 1, 2020 August 1, 2021
NCT04768023 Completed N/A 12 Weeks Vitamin D Supplementation and Physical Activity in PD Patients With DBS November 1, 2019 February 28, 2022
NCT04780776 Completed N/A Evaluating the Effect of Solius UV Light Source in Improving Vitamin D Status February 23, 2022 October 20, 2023
NCT04818957 Completed N/A Vitamin D Replacement Using Oral Thin Film (OTF) Cholecalciferol in Patients Undergoing Hematopoietic Stem Cell Transplantation June 7, 2021 April 20, 2022
NCT04822038 Completed N/A Immunomodulating Effects of Supplementation With 25-OH Vitamin D June 1, 2017 December 31, 2019
NCT04865432 Completed N/A Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D August 24, 2021 December 12, 2021
NCT04885803 Completed N/A Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3 March 26, 2021 July 30, 2021
NCT04891211 Completed N/A Retinal Changes in Vitamin D Deficiency February 12, 2021 March 10, 2021
NCT04915963 Completed Phase 3 Vitamin D Supplementation in Intensive Care Unit Patients January 20, 2016 May 30, 2019
NCT04918368 Completed Vitamin D and Sleep Disorders in Pregnancy August 20, 2017 March 15, 2019
NCT04935034 Completed N/A Absorption Kinetics and Efficacy of Vitamin D Enriched Supplements in Older Adults. July 1, 2018 May 31, 2021
NCT04939636 Completed N/A Vitamin D Supplementation in Estonian Conscripts July 19, 2021 June 16, 2022
NCT04939792 Completed Early Phase 1 Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans November 6, 2020 October 31, 2022
NCT04944212 Completed Prevalence of Vitamin D Deficiency in Pregnant Women and Their Fetus in North Jordan October 31, 2021 July 30, 2022
NCT04945577 Completed The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection July 1, 2020 August 1, 2020
NCT04979065 Completed Phase 2 Nutrition, Immunity, and Covid-19 in Obese People July 24, 2021 December 30, 2022
NCT04986319 Completed Reference Interval of Vitamin D of Coastal Fishermen in Cox's Bazar District of Bangladesh January 2017 August 15, 2021
NCT05014048 Completed N/A Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish Men January 4, 2018 May 14, 2018
NCT05024110 Completed N/A Effect of Exercise Intensity on Vitamin D January 25, 2021 May 14, 2021
NCT05066490 Completed N/A Effect of Exercise on Vitamin d in Obese October 6, 2020 March 25, 2021
NCT05073029 Completed N/A Open Label Randomized Clinical Study to Promote a Healthy Lifestyle in Medical Students February 10, 2019 November 10, 2019
NCT05141968 Completed N/A Vitamin D Supplementation and Glycemic Control Improvement Among Type 1 Diabetic Children October 1, 2017 June 16, 2021
NCT05149339 Completed Phase 1/Phase 2 Vitamin D Effect on A Disintegrin-like And Metalloprotease Thrombospondin1 Motif 13& Interleukin 6 in Leukemia March 1, 2019 March 15, 2021
NCT05221983 Completed COVID-19 and Vitamin D: Length of Hospital Stay and Mortality August 21, 2021 November 16, 2021
NCT05228925 Completed GraviD-child Follow-up of the Children´s Health, Growth and Development Within the GraviD-study February 1, 2022 February 14, 2023
NCT05343273 Completed 25-Hydroxyvitamin D Levels in Patients With Periodontitis (Stage III) March 10, 2022 May 10, 2022
NCT05364567 Completed N/A Synergistic Effect of Vitamin D Supplementation in Patients With Vitiligo and Vitamin D Deficiency May 1, 2018 May 1, 2022
NCT05385445 Completed N/A Electronic Medical Records to Increase Adherence to the Choosing Wisely Recommendations January 1, 2016 December 31, 2019
NCT05398939 Completed Impact of COVID-19 Vaccination on Serum 25-hydroxyvitamin D Level May 25, 2022 November 29, 2022
NCT05408273 Completed Vitamin D and Microvascular Function in Postmenopausal Women July 4, 2019 December 17, 2021
NCT05430932 Completed N/A Effect Of Laparoscopic Sleeve Gastrectomy on Vitamin D, Parathormone and Calcium Levels October 1, 2018 December 1, 2020
NCT05434377 Completed N/A A Study of Fixed Dose Versus Serum Level-Based Titration Regimen of Vitamin D Supplementation in Dialysis Patients August 1, 2022 December 31, 2023
NCT05460338 Completed Phase 2/Phase 3 Vitamin D, Oxidative Stress and Inflammation in Hemodialysis May 15, 2022 January 26, 2023
NCT05502068 Completed N/A The Effects of a Sublingual Sprayable Microemulsion of Vitamin D on Inflammatory Markers in COVID-19 Patients February 1, 2021 June 9, 2021
NCT05506696 Completed N/A Vitamin D Supplementation Study September 24, 2012 March 31, 2021
NCT05591170 Completed Phase 4 Effect of Single High Dose of Cholecalciferol on Serum Metabolites of Vitamin D April 1, 2021 August 31, 2021
NCT05630339 Completed N/A Magnesium and Vitamin D Combination for Post-COVID Syndrome January 30, 2022 September 1, 2023
NCT05649462 Completed Effect of Vitamin D Supplementation on Vedolizumab Response in Patients With Ulcerative Colitis January 1, 2020 June 1, 2022
NCT05654818 Completed N/A Peripheral Immunological Effects of High-dose Vitamin D Treatment in Healthy Subjects April 13, 2023 October 10, 2023
NCT05661006 Completed N/A ETOL-Elderly Study of the Efficiency of the Innovative Food Supplement in Elderly Adults February 20, 2020 June 29, 2020
NCT05706259 Completed N/A A Comparative Dissolution and Absorption Study of an Orodispersible Powder, Chewable Tablet and Soft Gel Capsule Vitamin D3 Supplementation January 11, 2023 April 30, 2023
NCT05806723 Completed Phase 4 Effects of High Intensity Statin Therapy on Steroid Hormones and Vitamin D in Type 2 Diabetic Men March 1, 2021 September 15, 2022
NCT05848349 Completed Vitamin D Status Among Infertile Women in Sweden September 1, 2020 August 30, 2021
NCT05916053 Completed N/A Supplementation and Depressive Symptomatology Incidence Among Saudi Arabian Adults September 1, 2021 March 1, 2022
NCT05922696 Completed Phase 2/Phase 3 Cholecalciferol Supplementation in Hemodialysis Patients May 15, 2022 January 26, 2023
NCT06002035 Completed Study on Clinical Value of Vitamin D in Recurrent Spontaneous Abortion January 1, 2021 July 25, 2023
NCT06033105 Completed Vitamin D Deficiency as a Risk Factor for the Development and Malignant Transformation of Oral Lichen Planus August 1, 2023 August 24, 2023
NCT06096194 Completed N/A Vitamin D3-enhanced Eggs in Preschool Children July 15, 2018 December 21, 2019
NCT06098820 Completed N/A The Effect of UV-C Enriched Foods on Vitamin D Deficiency March 5, 2023 August 31, 2023
NCT06114381 Completed N/A Physical Exercise and Diet Management in Vitamin D Deficient Females January 1, 2023 June 30, 2023
NCT06204796 Completed Phase 4 The Role of Vitamin D in Amelioration of Oral Lichen Planus and Its Effect on Salivary IFN-γ Level August 1, 2023 September 1, 2023
NCT06263140 Completed Vitamin D Levels in Non-immediate Drug Hypersensitivity Case-control Study May 30, 2021 February 1, 2022
NCT06274203 Completed N/A High Dose Vitamin D Supplementation in Children With Sickle Cell Disease May 3, 2023 February 10, 2024
NCT06282640 Completed Phase 4 Comparıson Of Electromyography Results Before And After Vıtamın D Treatment In Patıents Wıth Carpal Tunnel Syndrome December 30, 2021 August 30, 2022
NCT06412705 Completed N/A Vit D and Post-extractive Bone Turnover October 2, 2023 April 30, 2024
NCT06452251 Completed Vitamin-D Insufficiency and Implants January 1, 2022 October 1, 2023
NCT01049048 Completed Early Phase 1 The Effect of Vitamin D Statues on Endothelial Function March 2009 October 2010
NCT01050387 Completed N/A Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children January 2010 February 2013
NCT01058720 Completed Phase 4 Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents December 2009 January 2011
NCT01068418 Completed N/A Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity February 2010 September 2011
NCT01090206 Completed N/A Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia March 2010 March 2015
NCT01093417 Completed Phase 2 Study of Vitamin D and Effect on Heart Disease and Insulin Resistance January 2010 October 2010
NCT01105689 Completed Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers March 2010 July 2011
NCT01112891 Completed Phase 4 Vitamin D in Pregnancy and Lactation March 2010 February 2013
NCT01118806 Completed Vitamin D Levels in Residents in Medicine May 2010 November 2011
NCT01119378 Completed N/A Study to Observe the Capability to Absorb Calcium as an Measure of Adequate Levels of Vitamin D December 2010 December 2013
NCT01130181 Completed Phase 3 VITdAL@ICU - Correction of Vitamin D Deficiency in Critically Ill Patients May 2010 September 2012
NCT01141972 Completed Phase 1 The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition September 2010 February 2012
NCT01166165 Completed Phase 2 Effect of Vitamin D Replacement During Winter Months in Patients With Hypertension July 2010 April 2011
NCT01170273 Completed Phase 3 Vitamin D in Vulnerable Adults (VIVA-VA) August 2010 December 2014
NCT01170494 Completed N/A Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels February 2013 April 2016
NCT01175798 Completed N/A Impact of Vitamin D Repletion in Hemodialysis Patients August 2010 August 2013
NCT01180946 Completed N/A Vitamin D Deficiency in Adolescent Girls September 2010 April 2013
NCT01187459 Completed Phase 4 Vitamin D in Pediatric Crohn's Disease September 2010 February 2012
NCT01190683 Completed Phase 3 Vitamin D and Muscle Strength and Surface (Electromyography) EMG August 2010 April 2011
NCT01208636 Completed Environmental & Genetic Influences on Vitamin D Status August 2010 August 2010
NCT01214928 Completed N/A Hemodialysis Vitamin D Pilot January 2011 June 2011
NCT01229189 Completed N/A Evaluation of the Effectiveness of Vitamin D Supplementation to Pregnant Women and Their Infants in Pakistan. February 2010 August 2011
NCT01229878 Completed N/A Vitamin D Supplementation in Kidney Disease December 1, 2011 December 30, 2022
NCT01240265 Completed Phase 2/Phase 3 Vitamin D Supplementation in Breastfeeding Women December 2010 August 2011
NCT01240512 Completed N/A DAYLIGHT: Vitamin D Therapy in Individuals at High Risk of Hypertension December 2010 October 2013
NCT01244204 Completed N/A Role of Vitamin D in Innate Immunity to Tuberculosis November 2009 March 2011
NCT01250899 Completed N/A Vitamin D in HIV-Infected Patients on HAART October 2010 June 2012
NCT01268176 Completed Phase 1 The Effect of a Meal on Vitamin D Absorption December 2010 June 2012
NCT01287455 Completed N/A The Effect of Vitamin D Replacement on Airway Reactivity, Allergy and Inflammatory Mediators in Exhaled Breath Condensate in Vitamin D Deficient Asthmatic Children February 2011 December 2012
NCT01292720 Completed Phase 3 Vitamin D Supplementation in Chronic Stable Heart Failure April 2011 October 2013
NCT01295879 Completed Phase 4 Vitamin D Repletion in Stone Formers With Hypercalciuria September 2010 June 2011
NCT01306656 Completed Phase 4 Vitamin D Repletion in Primary Hyperparathyroidism October 2011 February 2017
NCT01317940 Completed Phase 2 Nutrition and Body Composition in Acute Lymphoblastic Leukemia March 2011 January 2016
NCT01325610 Completed N/A Vitamin D Effect on Calcium Absorption on Persons on Hemodialysis April 2011 February 2012
NCT01325987 Completed N/A African American Children, Glycemic Control, and Type 2 Diabetes March 2011 June 2013
NCT01328704 Completed Evaluate the Change in Iron, Vitamin D, and C-Reactive Protein Level (CRP) in a 12 to 24 Week Period January 2012 March 2013
NCT01349127 Completed N/A Trial to Assess Vitamin D Requirements in Lactating Women August 2008 December 2009
NCT01354262 Completed Phase 2 Effect of Vitamin D Supplementation on Hemoglobin A1c March 2011 June 2012
NCT01363167 Completed N/A Identifying Vitamin D Deficiency in Very Low Birth Weight Infant (VLBW) Infants Part 2 October 2011 October 2013
NCT01385098 Completed N/A Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients July 2011 September 2015
NCT01395589 Completed Phase 1 Rapid vs Maintenance Vitamin D Supplementation in Deficient Children With Asthma to Prevent Exacerbations. February 2011 June 2014
NCT01397383 Completed Vitamin D and Functional Outcomes After Total Hip Arthroplasty (THA) March 2010 February 3, 2014
NCT01399151 Completed N/A Assessment of Vitamin D Supplementation and Immune Function January 2011 April 2014
NCT01410084 Completed N/A Improving Vitamin D Status in Home-bound Elders October 2010 August 2011
NCT01410305 Completed Vitamin D and HIV-Cardiovascular Disease in Children and Young Adults September 2011 December 2014
NCT01413230 Completed Vitamin D Supplementation in Systemic Lupus Erythematosus January 2010 January 2011
NCT01417351 Completed N/A Effects of Vitamin D Supplementation During Pregnancy on Clinical Outcomes and Immune Function August 2010 May 2013
NCT01419119 Completed Phase 4 Vitamin Deficiency in Immigrants, a Treatment Study September 2011 October 2012
NCT01426347 Completed N/A Treatment of Vitamin D Deficiency in Patients With Rheumatoid Arthritis January 2009 January 2012
NCT01430793 Completed N/A Determination of Effective Vitamin D Replacement and Monitoring Strategies in Vitamin D Deficiency State November 2011 March 2013
NCT01432678 Completed Vitamin D Status in Pediatric Asthma April 2011 June 2013
NCT01436916 Completed Phase 4 Oral Cholecalciferol in Prevention of Type 2 Diabetes Mellitus September 2011 December 2012
NCT01437696 Completed Phase 4 How Much Vitamin D is Required to be Protective Against Deficiency During the Winter Months? October 2011 May 2014
NCT01443728 Completed Phase 2 Vitamin D for Sickle-cell Respiratory Complications December 13, 2011 February 15, 2015
NCT01443897 Completed N/A Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults May 2010 June 2011
NCT01465178 Completed Phase 3 Improving the Understanding of the Response to Vitamin D Supplementation December 2011 December 2014
NCT01477034 Completed N/A Vitamin D and Adipose Tissue Inflammation November 2011 June 2013
NCT01488734 Completed N/A Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom November 2011 September 2013
NCT01490333 Completed Phase 2 Sunweavers: Supporting Native American Women's Vitamin D Research July 2011 April 2014
NCT01497132 Completed Phase 4 Effects of Vitamin D on Beta Cell Function and Insulin Sensitivity in Pre-diabetes and Diabetes Mellitus Type 2 January 2012 May 2013
NCT01503216 Completed N/A Safety and Bioefficacy of Vitamin D2 and Vitamin D3 January 2012 May 2012
NCT01506557 Completed Phase 4 Vitamin D Supplementation of Lactating Mothers March 2011 November 2012
NCT00092066 Completed Phase 3 A Study to Evaluate the Safety, Tolerability, and Efficacy of an Investigational Drug and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227) September 24, 2003 May 1, 2004
NCT01512537 Completed N/A Alternative Treatments of Vitamin D Deficiency February 2010 November 2011
NCT01519986 Completed N/A The Effect of Fat on Vitamin D Absorption September 2011 October 2011
NCT01535508 Completed Phase 2/Phase 3 Open Label Clinical Trial of Vitamin D in Children With Autism February 2012 December 2015
NCT01537809 Completed N/A Impact of Vitamin D Supplementation on Cardiometabolic Risk Factors [The Daily D Health Study] June 2011 December 2013
NCT01546103 Completed N/A Vitamin D3 Supplementation Pilot Study August 2011 September 2012
NCT01548716 Completed A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients September 2011 February 2012
NCT01549938 Completed Phase 2 Cholecalciferol Intervention to Prevent Respiratory Infections Study May 2012
NCT01553344 Completed Serum Sclerostin Level & Treatment of Vitamin D Deficiency March 2012 November 2013
NCT01570309 Completed N/A Vitamin D Repletion in Coronary Artery Disease August 2008 March 2011
NCT01583621 Completed N/A Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY) November 2011 August 2015
NCT01589783 Completed Vitamin D During Pregnancy May 2012 June 2015
NCT01596842 Completed Phase 4 Effect of Omega-3 Fatty Acid on Vitamin D Activation May 2012 December 2012
NCT01600430 Completed Phase 2/Phase 3 Vitamin D Supplementation for Extremely Preterm Infants June 2012 December 2016
NCT01633853 Completed Phase 4 Efficacy of Vitamin D2 to Treat Chronic Kidney Disease Mineral and Bone Disorder July 2012 September 2015
NCT01634607 Completed Bone Health and Vitamin D Status December 1, 2019 February 16, 2023
NCT01636570 Completed Phase 2 Vitamin D3 Supplementation for Heart Failure Patients August 2012 April 2015
NCT01639222 Completed Phase 1 Human Pharmacology Trial of Calcium-vitamin D3 Tablet in Healthy Participants July 2012 August 2012
NCT01651000 Completed Phase 3 Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency September 2012 July 2014
NCT01655810 Completed N/A Vitamin D, Cardiovascular Disease, and African Americans August 13, 2012 February 9, 2018
NCT01656070 Completed Phase 2 Vitamin D Supplementation in HIV-infected Youth April 2011 July 2012
NCT01688102 Completed N/A The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile September 2012 July 2015
NCT01694355 Completed N/A The Impact of Severe Vitamin D Deficiency and Its Correction on Bone Mineral Density (BMD) in Postmenopausal Women October 2012 December 2018
NCT01696409 Completed The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression July 2009 June 2012
NCT01696526 Completed N/A Bioefficiency of of Conventional Fish and Vitamin D Fortified Fish October 2012 December 2012
NCT01704079 Completed Phase 3 Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency November 2012 September 2014
NCT01721915 Completed Phase 4 Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism October 2012 October 12, 2017
NCT01726777 Completed Phase 2 Effect of Vitamin D Supplementation on Glucose Tolerance in Subjects at Risk for Diabetes With Low Vitamin D. October 2012 September 2015
NCT01741181 Completed Phase 4 Vitamin D Supplementation in Patients With Diabetes Mellitus Type 2 September 2012 November 2014
NCT01741233 Completed N/A The Genetics Behind Vitamin D Status (VitDgen) November 2012 March 2013
NCT01741324 Completed N/A Comparing Different Amounts of Vitamin D Supplementation to Preschool Children Living in Northern and Southern Sweden November 2012 July 2013
NCT01746264 Completed Phase 1 Effect of Vitamin D Supplementation on Endothelial Function in Obese Adolescents November 2012 December 2013
NCT01778114 Completed N/A Availability of Vitamin D in Orange Juice December 2006 June 2007
NCT01784029 Completed Phase 4 Treatment Study of Vitamin D Deficiency in Adolescents February 2013 July 2014
NCT01793181 Completed Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study January 2013 November 2014
NCT01797302 Completed N/A Vitamin D and Vascular Health in Children August 2013 August 13, 2018
NCT01815437 Completed N/A Evaluating Vitamin D Content in Mushrooms January 2012 June 2013
NCT01816711 Completed Vitamin D Levels in Frail Elderly Patients With a Hip Fracture January 2010 September 2012
NCT01817036 Completed Phase 1 Vitamin D Intervention Trial in Healthy Chinese January 2013 July 2013
NCT01817231 Completed Epidemiological Analysis of Vitamin D and Breast Cancer Risk in Saudi Arabian Women May 2009 August 2009
NCT01838447 Completed Phase 2 Prevention of Vitamin D Deficiency Following Pediatric CHD Surgery: a Phase II Dose Evaluation Randomized Controlled Trial Comparing Usual Care With a High Dose Pre-operative Supplementation Regimen Based on the Institute of Medicine Daily Upper Tolerable Intake Level July 2013 December 2015
NCT01845142 Completed Phase 4 Immunologic Action of a Single Dose Cholecalciferol February 2013 April 2014
NCT01848236 Completed N/A Effects of Vitamin D Insufficiency in Man August 2010 February 2020
NCT01909063 Completed N/A A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice January 2005 January 2008
NCT01910792 Completed N/A Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass Surgery March 2011 February 2014
NCT01924910 Completed Phase 4 A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults October 2012 July 2017
NCT01926808 Completed Vitamin D Serum Concentrations & Supplementation in Children With Cerebral Palsy June 2013
NCT01930539 Completed N/A Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B Lamp September 16, 2013 December 1, 2015
NCT01971411 Completed Vitamin D Deficiency in Elderly African American Women in Central Texas March 2006 May 2007
NCT01971801 Completed N/A Vitamin D Supplementation in Older Adults With Urinary Incontinence January 2014 November 2017
NCT01990872 Completed N/A Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults October 2012 November 2013
NCT01991054 Completed Phase 4 The Effects of Vitamin D Supplementation on Patients With Type 2 Diabetes and Vitamin D Deficiency December 2013 January 2018
NCT01992133 Completed N/A Effects of Vitamin D Supplementation on Glucose Metabolism in Women With Former Gestational Diabetes Mellitus June 2011 August 2012
NCT01993537 Completed Phase 4 The Role of Vitamin D in the Pathophysiology of Chronic Failure January 2013 January 2016
NCT01998763 Completed Phase 1 Vitamin D Intervention Trial in Healthy Chinese, Phase II November 2013 December 2015
NCT02008201 Completed Phase 3 Vitamin D Status and Supplementation in Athletes May 2012 April 2014
NCT02009748 Completed Phase 2 Vitamin D Supplementation in Cirrhotic Patients December 2013 June 2015
NCT02019836 Completed Comparison of Maternal and Neonatal Vitamin D Levels in Term Neonates With and Without Early Onset Sepsis March 2012 January 2013
NCT02022475 Completed Phase 3 Effect of Vitamin D Treatment on Fatigue December 2013 June 2015
NCT02024490 Completed The Effect of Maternal and Neonatal Vitamin D Levels on Respiratory Distress Syndrome in Preterm Infants December 2012 December 2013
NCT02035423 Completed N/A Community Interventional Trial (CITFOMIST) January 2011 June 2011
NCT02069990 Completed Phase 3 Controlled, Randomized, Four-arm Comparative, Open Label, Multi-centric Clinical Trial to Compare the Efficacy and Safety Parameters of the Once-a-week or Once-a-month Administered 7000 IU, or 30000 IU Vitamin D (Cholecalciferol) to a 1000 IU Dosage Applied Daily in Vitamin D Deficient Patients March 2013 September 2013
NCT02091219 Completed Early Phase 1 Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function June 2014 December 7, 2019
NCT02099955 Completed Phase 1/Phase 2 Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI January 2012 December 2016
NCT02118129 Completed N/A Vitamin D Among Young Adults: an Intervention Study Using a Mobile 'App'. September 2014 September 2016
NCT02132442 Completed Phase 3 Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes March 2014 October 2016
NCT02135913 Completed N/A Roles of Vitamin D and HDL in Obese Children January 1, 2016 April 26, 2017
NCT02136771 Completed Phase 4 Styrian Vitamin D Hypertension Trial June 2011 August 2014
NCT02145195 Completed N/A The Effect of Vitamin D Supplements on Vitamin D Status, Cardiometabolic Health and Immune Defense in Danish Children June 2014 March 2015
NCT02158143 Completed N/A A Single High-dose Oral Supplement of Vitamin D in Young Chinese October 2013
NCT02158598 Completed Phase 4 Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills June 2014 May 9, 2018
NCT02168660 Completed Phase 2 Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth March 2011 October 11, 2015
NCT02186028 Completed Phase 4 Effect of Oral Daily Supplementation With 400 IU Vs 200 IU of Vitamin D in Term Healthy Neonates July 2014 July 2015
NCT02186535 Completed Phase 1 The Role of Vitamin D in Female Reproductive Tract Immunity August 2014 July 2015
NCT02187146 Completed The Effects of Serum Vitamin D and IVF Outcome September 2013 December 2015
NCT02190396 Completed Vitamin D Deficiency and Placental Calcification in Low-risk Obstetric Population - Are They Related? March 2014 May 2014
NCT02210884 Completed N/A Maternal Vit D Supplements & Infant and Maternal Biomarkers & Outcomes in Southern Ethiopia October 2014 September 2016
NCT02214563 Completed Phase 4 Cholecalciferol Supplementation for Anemia and Mineral and Bone Disorder in Hemodialysis Patients August 2014 December 2016
NCT02217553 Completed N/A The Effect of Vitamin D Supplementation on HIV-associated Platelet Hyperreactivity December 2013 June 2014
NCT02234544 Completed Phase 4 Effect of an Inhibitor of Cholesterol Absorption on Vitamin D Levels October 2014 April 2015
NCT02250625 Completed Study Vitamin D in Healthy Individuals May 2014 April 2015
NCT02271971 Completed N/A Effect of Vitamin D Supplementation on Metabolic Parameters of Patients With Psoriasis October 2014 October 2015
NCT02275650 Completed N/A The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter September 2013 May 2014
NCT02281162 Completed The Influence of Vitamin D on Atypical Antipsychotic-induced Weight Gain November 2014 September 2015
NCT02282813 Completed Phase 3 Extension Study of CTAP101-CL-3001 or CTAP101-CL-3002 April 2013 May 2015
NCT02293187 Completed N/A Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function March 23, 2015 December 31, 2018
NCT02295228 Completed Hip Arthroplasty and Vitamin D Status January 2015 November 2015
NCT02301520 Completed Vitamin D, Iodine, and Lead Levels in Haitian Infants and Children. January 2015 June 2015
NCT02362269 Completed N/A Personalized Vitamin D Supplementation in European and African Americans October 30, 2015 May 3, 2019
NCT02395081 Completed N/A Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia February 2015 December 2016
NCT02404623 Completed N/A The Effect of Vitamin D Administration to Premature Infants on Vitamin D Status and Respiratory Morbidity April 2015 February 12, 2018
NCT02414529 Completed N/A Efficacy of Vitamin D Therapy on Glucose Homeostasis in Obese Adolescents November 2013 October 2015
NCT02416895 Completed Vitamin D Status and Immune Function April 2014 December 2015
NCT02438488 Completed Vitamin D and Mortality: an Individual Participant Data Meta-analysis of Standardized 25-hydroxyvitamin D April 2015 October 2015
NCT02443246 Completed Phase 3 A Prospective, Multi-center Study to Evaluate the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency November 2014 December 2015
NCT02451787 Completed Phase 2 The 'Hidden' Biological Impact of Vitamin D Deficiency: a Biomarker Study; Part 2 December 2015 July 2016
NCT02460211 Completed N/A Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D July 2015 October 1, 2020
NCT02460380 Completed Phase 4 The Effects of Vitamin D on Angiogenic Factors in Women With Polycystic Ovary Syndrome October 2013 March 2015
NCT02477956 Completed Phase 1 Effect of a Monthly High Dose of Vitamin D3 on Bariatric Surgery Patients November 2012 December 2013
NCT02483026 Completed N/A Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy January 2, 2018 January 12, 2020
NCT02485197 Completed N/A Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise March 2013 June 2015
NCT02506439 Completed N/A Nutritional Requirements for Vitamin D in Pregnant Women November 1, 2014 April 1, 2017
NCT02534064 Completed N/A Effect of Consumption of Yogurt Fortified in Calcium and Vit. D on Circulating Levels of 25OHD in Postmenopausal Women October 2014 October 2015
NCT02539745 Completed Associations of Vitamin D Deficiency and Vitamin D Receptor Polymorphisms With the Risk of Primary Open-angle Glaucoma July 2013 March 2015
NCT02553044 Completed N/A Change in Free 25(OH)D After High Dose in Vitamin D Deficient Postmenopausal Women October 2015 August 2018
NCT02572960 Completed Phase 4 Physiologic Interactions Between the Adrenal- and the Parathyroid Glands October 2015 May 2017
NCT02589444 Completed N/A Vitamin D and Microbiota in Cystic Fibrosis December 2015 April 2017
NCT02590614 Completed N/A Genetic, Dietary and Environmental Influences on Vitamin D Metabolism November 2013 April 24, 2019
NCT02613884 Completed Phase 2 Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis November 2016 November 25, 2019
NCT02621320 Completed N/A Vitamin D Supplementation in Wheelchair Indoor Athletes November 2015 August 2016
NCT02631629 Completed N/A Food-based Solutions for Optimal Vitamin D Nutrition and Health November 2015 May 2016
NCT02661191 Completed N/A Vitamin D Deficiency and Asthma Exacerbation October 2012 March 2014
NCT02662491 Completed N/A Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens January 2017 March 15, 2019
NCT02676674 Completed Phase 1 Vitamin D Levels Following Topical Application of Vitamin D Ointment March 2016 June 15, 2017
NCT02678364 Completed N/A Effect of Vitamin D-biofortified Eggs on Wintertime Serum 25-hydroxyvitamin D in Adults: Randomized Controlled Trial January 2015 December 2015
NCT05389618 Enrolling by invitation Dietary Challenges in the Population of Nursing Homes' Residents May 26, 2022 December 31, 2023
NCT05795504 Enrolling by invitation N/A Resistive Exercise Versus HIIT on Calcium and Vitamin D March 1, 2023 December 15, 2023
NCT05702970 Not yet recruiting Phase 4 Beneficial Effects of Vitamin D Combined With Oral Iron Supplementation in Patients With Chronic Heart Failure and Iron Deficiency January 15, 2024 October 31, 2025
NCT06450925 Not yet recruiting N/A Vitamin A Supplementation in Allogeneic Stem Cell Transplantation. October 2024 August 2029
NCT06111066 Not yet recruiting Vitamin D Levels in Neonatal Umbilical Cord Blood: Factors and Prognostic Analysis January 1, 2024 December 30, 2029
NCT06199102 Not yet recruiting N/A The High Initial Dose of Monitored Vitamin D Supplementation in Preterm Infants. September 1, 2024 December 31, 2027
NCT06258850 Not yet recruiting Phase 4 REstoration of VItamin D in Pulmonary Arterial Hypertension July 1, 2024 December 2027
NCT04355572 Not yet recruiting N/A Evaluation of the Clinical and Psychological Impact of Vitamin D Replacement in Adolescent Females at Risk for Polycystic Ovarian Syndrome (PCOS) April 2024 March 2025
NCT05009498 Not yet recruiting N/A Vitamin D3 Supplementation for Vitamin D Deficiency in Rotator Cuff Repair Surgery September 1, 2021 August 1, 2024
NCT05568836 Not yet recruiting Phase 1/Phase 2 Relationship Between Serum Vitamin D and Outcomes of Liver Transplantation in Cirrhotic Patients Undergoing Liver Transplantation and Effects of Vitamin D Supplementation in Post-transplant Period November 1, 2022 November 10, 2023
NCT06176157 Not yet recruiting Phase 4 Vitamin D Supplementation in Pediatrics. Oral or Parenteral! D2 or D3 December 2023 April 2024
NCT05650151 Not yet recruiting N/A Peri-operative Vitamin D Therapy for Hepatectomy January 1, 2023 January 31, 2024
NCT06366776 Not yet recruiting Emulated Study of Vitamin D Correction vs Non-Correction April 2024 December 2024
NCT05852496 Not yet recruiting Phase 2 Vit D and Peripheral Neuropathy in Taxane Naive Patients July 1, 2023 September 1, 2024
NCT05322538 Not yet recruiting N/A Menier's Disease - Bone Density Study October 1, 2022 December 31, 2028
NCT05863949 Not yet recruiting N/A Clinical Trial of Vit D and Calcium for Recurrent BPPV July 2023 July 2025
NCT05981534 Recruiting N/A The Effectiveness of Vitamin D Supplementation in Patients With End-stage Knee Osteoarthritis March 17, 2024 November 30, 2025
NCT04677816 Recruiting Phase 2 Impact of Vitamin D Supplementation on the Rate of Pathologic Complete Response in Vitamin D Deficient Patients October 22, 2021 March 2025
NCT03742505 Recruiting Phase 3 Rapid Normalization of Vitamin D Deficiency in PICU June 17, 2019 August 31, 2025
NCT04898725 Recruiting N/A Effects of Vitamin D Supplementation on Depression and Inflammatory Markers April 12, 2021 June 28, 2024
NCT05950204 Recruiting N/A Effect of Supplementation With ω-3 Fatty Acids, Vitamin D and Calcium in Patients With Acute Lymphoblastic Leukemia. September 10, 2022 December 31, 2024
NCT05937789 Recruiting N/A Effects of Early Vitamin D3 Supplementation on Clinical Outcomes for Critically Ill Patients January 22, 2024 December 31, 2026
NCT05549154 Recruiting N/A A Study on Prevention Strategies for CKD-SHPT and Related Complications Based on General Vitamin D Supplementation December 5, 2022 October 30, 2023
NCT05656742 Recruiting N/A Effects of Vitamin D on Cardiovascular Health in Black Women January 25, 2023 August 2024
NCT03483584 Recruiting Incidence of HANA Conditions in HIV-infected Individuals April 6, 2018 March 31, 2024
NCT05659173 Recruiting Vitamin D Deficiency With Selected Vitamin D Receptor Gene Polymorphism in Gestational Hypertension November 1, 2022 September 30, 2024
NCT04331639 Recruiting Phase 2 High Dose Interval Vitamin D Supplementation in Patients With Inflammatory Bowel Disease Receiving Biologic Therapy November 1, 2020 September 2024
NCT06292195 Recruiting Effects of Vitamin D on Health Promotion During Pregnancy and Its Impact on Prematurity-Related Outcome November 3, 2023 December 31, 2025
NCT03188796 Recruiting Phase 3 The VITDALIZE Study: Effect of High-dose Vitamin D3 on 28-day Mortality in Adult Critically Ill Patients October 10, 2017 March 2025
NCT05724316 Recruiting N/A Effects of Vitamin D on the Behaviours, Mental, and Physical Health of Prisoners March 18, 2023 March 2024
NCT04229368 Recruiting N/A Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications September 1, 2019 July 1, 2024
NCT03989778 Recruiting Phase 2 Vitamin D and Polycystic Ovarian Syndrome (PCOS) February 1, 2023 June 13, 2025
NCT05084248 Recruiting Phase 4 Vitamin D Deficiency in Adults Following a Major Burn Injury September 29, 2022 March 2025
NCT05018988 Recruiting N/A Vitamin D in School Children November 1, 2019 October 30, 2025
NCT05824897 Recruiting The Cohort Study of the Correlation Between Serum 25(OH)D Level and Pregnancy Outcome November 1, 2022 January 31, 2024
NCT05802433 Recruiting N/A The Genetic Effects on Vitamin D Supplementation May 16, 2022 October 5, 2023
NCT05459298 Recruiting N/A ViDES Trial (Vitamin D Extra Supplementation) September 6, 2022 December 1, 2027
NCT06203041 Recruiting N/A Vitamin D Sulfates in Breastmilk November 21, 2023 December 2026
NCT05543928 Recruiting Phase 3 Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary Hyperparathyroidism January 31, 2023 July 2025
NCT05449522 Recruiting N/A Vitamin D for Critically Traumatic Patients May 1, 2018 July 1, 2026
NCT05431920 Recruiting N/A Effects of Vitamin D Supplementation in Adolescents With Asthma, Obesity and Vitamin D Deficiency. October 1, 2022 August 1, 2024
NCT05517070 Recruiting Vitamin D Deficiency and Body Composition in the Patients With Hemophilia January 1, 2021 February 28, 2023
NCT06067477 Recruiting N/A Estimation of the Dietary Requirement for Vitamin D in Ethnic Groups November 1, 2023 September 2025
NCT03348280 Recruiting Vitamin D and Immune Mechanisms of Hypertension in Type 2 Diabetics September 1, 2017 December 31, 2023
NCT05694689 Recruiting N/A Randomized Trial of Enteral Vitamin D Supplementation in Infants < 28 Weeks Gestational Age or <1000 Grams Birth Weight February 15, 2023 June 1, 2026
NCT05860270 Recruiting Phase 4 Oral Vitamin D Supplementation Prevent Peritoneal Dialysis-related Peritonitis June 15, 2023 May 31, 2026
NCT05216419 Recruiting Phase 4 Prevention of Postoperative Hypocalcemia of Oral Vitamin D Supplementation Before Total Thyroidectomy June 7, 2021 October 31, 2024
NCT04840238 Suspended Phase 2 30000 IU Per Week Vitamin D Treatment in PCOS Patients December 8, 2016 September 2023
NCT04395638 Suspended N/A Replenishing and Maintaining Vitamin D Status in Older Adults in Residential Care Facilities in NI September 1, 2020 February 28, 2021
NCT03066817 Suspended Phase 1/Phase 2 Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients July 1, 2017 March 2020
NCT03652987 Suspended Endocrine and Menstrual Disturbances in Women With Polycystic Ovary Syndrome (PCOS) September 5, 2018 September 2023
NCT00974922 Terminated Phase 4 Vitamin D Deficiency in Patients With Hypertension August 2009 December 2011
NCT01046773 Terminated Phase 1 Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease January 2010 May 2017
NCT03615378 Terminated Early Phase 1 Maintenance Dosing of Vitamin D in Crohn's Disease August 30, 2018 November 30, 2018
NCT02381600 Terminated N/A An Evaluation of the Effect of Vitamin D Supplementation on the Cognitive Function of Older Subjects With Low Levels of This Vitamin October 2015 October 2016
NCT01145703 Terminated N/A Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly May 2010 February 2013
NCT02435771 Terminated Phase 4 Efficacy Of Ergocalciferol In Adults According To BMI July 2011 April 2017
NCT01170442 Terminated Phase 3 Does Vitamin D Improve Glycemic Control in Type II DM? December 2011 December 2013
NCT03734744 Terminated N/A PK/PD of Vitamin D3 in Adults With CF June 17, 2019 May 16, 2022
NCT01183442 Terminated Phase 3 Vitamin D Supplementation in CAD and Postchallenge Hyperglycemia June 2010 November 2012
NCT01234909 Terminated Asthma, Missed Immunizations, and Vitamin D Deficiency in Atopic Dermatitis November 2010 March 2013
NCT00469599 Terminated N/A Treatment of Secondary Hyperparathyroidism in the Uremic Patient July 2007 October 2010
NCT02563015 Terminated N/A Can Correction of Low Vitamin D Status in Infancy Program for a Leaner Body Composition? March 7, 2016 September 20, 2020
NCT01312441 Terminated Phase 4 Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D January 2011 August 2015
NCT01337635 Terminated N/A Vitamin D Deficiency and Atopic Dermatitis November 2010 April 2013
NCT01385345 Terminated N/A Vitamin D Replacement in Insulin Resistant South Asians August 2012 January 2014
NCT01419743 Terminated Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes August 2011 January 2014
NCT02868827 Terminated Phase 2/Phase 3 Cholecalciferol Supplementation in Critically Ill Patients With Severe Vitamin D Deficiency. August 27, 2017 November 9, 2019
NCT02876822 Terminated N/A High Dose Vitamin D Replacement in Patients Undergoing Hematopoietic Stem Cell Transplantation August 26, 2016 May 1, 2017
NCT04120064 Terminated Phase 1 Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol January 25, 2019 January 15, 2021
NCT00996866 Terminated N/A Vitamin D Supplementation Requirement in Obese Subjects December 2008 August 2013
NCT03148288 Terminated N/A Vitamin D Supplementation in IBS September 1, 2017 March 20, 2018
NCT03270709 Terminated Phase 1 Effect of High-Dose Vitamin D3 in Smokers and Non-Smokers With and Without HIV April 11, 2018 October 15, 2018
NCT01817699 Terminated Phase 4 Correcting Anemia and Native Vitamin D Supplementation in Kidney Transplant Recipients April 2013 December 2018
NCT03356873 Terminated N/A Impact of Correction of Vitamin D Deficiency in Oxidative Stress in Patients With Prediabetes (VICOX) September 1, 2017 July 18, 2022
NCT03380091 Terminated Phase 4 Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial December 12, 2017 September 1, 2019
NCT00585442 Terminated Early Phase 1 Effects of Vitamin D on Renin Expression in Hypertensive Patients May 2007 June 2008
NCT04629534 Terminated Phase 4 Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot Study May 6, 2021 April 1, 2022
NCT03471481 Terminated Magnesium as a Mediator of Bone and Vitamin D Metabolism in Patients on Antiepileptic Drug Therapy August 10, 2015 August 1, 2019
NCT03472833 Terminated Phase 3 High-dose Vitamin D3 in Pancreas Cancer April 1, 2018 April 20, 2021
NCT02166333 Terminated N/A Study To Understand Fall Reduction and Vitamin D in You June 30, 2015 June 7, 2019
NCT02208310 Terminated Phase 4 Trial of High Dose Vitamin D in Patient's With Crohn's Disease April 2015 April 2016
NCT02212652 Terminated N/A Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes January 2017 April 2017
NCT03611049 Terminated Phase 2 Improving Functionality in Older People August 1, 2018 July 19, 2019
NCT04308850 Unknown status Early Phase 1 Exploring the Effects of Vitamin D Supplementation on the Chronic Course of Patients With Crohn's Disease With Vitamin D Deficiency October 2020 April 2021
NCT05106712 Unknown status N/A Vitamin D Supplementation and Improvement of PCOS Therapy and IVF Outcomes in Infertile Saudi Women November 1, 2021 November 1, 2023
NCT03638037 Unknown status Correlation Between Maternal Vitamin D Level And Preterm Birth September 2, 2018 April 2019
NCT03477136 Unknown status Serum and Semen Vitamin D Level With Semen Parameters December 6, 2018 April 2021
NCT03482843 Unknown status Vitamin D Effect on Subarachnoid Hemorrhage February 1, 2017 December 31, 2019
NCT02389179 Unknown status Phase 4 Determination of Vitamin D Dose to Maintain Sufficiency Amongst Indian and Malay Women in the Tropics August 2014 July 2016
NCT03496246 Unknown status N/A Vitamin D Status in Inflammatory Bowel Disease April 2018 June 2019
NCT02258035 Unknown status Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers November 2014 December 2020
NCT03534674 Unknown status N/A Vitamin D3 Supplementation for AlloHSCT-RCT June 15, 2018 December 15, 2019
NCT02337257 Unknown status Early Phase 1 Periodontal and Cardiometabolic Responses to Vitamin D Intervention in African Americans With Periodontal Disease April 2014 December 2015
NCT02795234 Unknown status N/A Empirical Comperative Study Of Variation Blood Level Antibody Vitamin D at Different Groups Of Patients Compared Healthy Peoples June 2016 June 2017
NCT02803476 Unknown status Is There Association Between Vitamin D Levels And Insulin Resistance In Polycystic Ovary Syndrome? March 2016 August 2016
NCT05047393 Unknown status Vitamin D Level and Pain Type in Coccygodynia August 1, 2021 February 28, 2022
NCT00640237 Unknown status Phase 3 Interventional Trial of Vitamin D Deficiency in the Patients of General Departments March 2008 August 2008
NCT01419821 Unknown status N/A Vitamin D and Its Affect on Growth Rates and Bone Mineral Density Until Age 5 September 2013 September 2016
NCT01417923 Unknown status Phase 4 The Immune and Clinical Impacts of Vitamin D in Patients With Chronic Musculo-skeletal Pain September 2011 December 2012
NCT04100226 Unknown status N/A Vitamin D Deficiency and Effect of Its Supplementation on Interstitial Lung Diseases(ILD). March 1, 2019 January 1, 2020
NCT01477801 Unknown status Phase 2/Phase 3 Effects of Cholecalciferol Supplementation in Patients With Chronic Heart Failure and LOw vITamind D Levels November 2011 September 2012
NCT03584529 Unknown status N/A Association Between Vitamin D and the Development of Uterine Fibroids September 15, 2018 July 1, 2021
NCT04134065 Unknown status Early Phase 1 the Effect of Vitamin D in Crohn's Disease December 1, 2019 December 31, 2020
NCT02192229 Unknown status Phase 2 Efficacy of the Dose Regimen of Oral Vitamin D 50,000 IU in the Treatment of Vitamin D Deficiency August 2014 November 2014
NCT05104970 Unknown status Phase 2 Comparative Pharmacokinetics of Two Different Oral Delivery Systems of Cholecalciferol August 9, 2022 February 10, 2023
NCT03063060 Unknown status The Impact of Vitamin D Deficiency on Hypocalcaemia Following Total Thyroidectomy March 1, 2017 March 1, 2018
NCT03991845 Unknown status Phase 4 A Trial to Evaluate the Effect of Vitamin D Supplementation in Patients With Chronic Urticaria June 21, 2019 December 28, 2019
NCT05141838 Unknown status Phase 4 Vitamin D Status and Bone Metabolism Status in Children With Congenital Epidermolysis Bullosa November 21, 2020 January 2023
NCT02704624 Unknown status Phase 4 Effects of Supplementation of Vitamin D in Patients With Crohn's Disease December 2016 February 2022
NCT01575717 Unknown status N/A The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List January 2012 January 2013
NCT03931889 Unknown status N/A Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overlap (ACO) Patients March 1, 2018 June 30, 2019
NCT01385085 Unknown status Impact of Work Environment Absent of Natural Light on Vitamin D Levels November 2011
NCT04244474 Unknown status Phase 1/Phase 2 Effect of Vitamin D Supplementation on Improvement of Pneumonic Children September 9, 2019 February 15, 2020
NCT04276636 Unknown status Early Phase 1 Exploring the Effects of Caltrate Supplement on the Chronic Course of Crohn's Disease Patients With Vitamin D Deficiency October 2020 March 2021
NCT05151393 Unknown status Correlation Between Serum Vitamin D3 and Incidence of Uterine Leiomyoma December 1, 2021 February 15, 2022
NCT04291313 Unknown status N/A Vitamin D in Pregnancy June 8, 2020 May 2023
NCT01339741 Unknown status N/A Efficacy of Vitamin D3 for the Treatment of Psoriatic Patients With Vitamin D Deficiency and Insufficiency March 2011 February 2012
NCT01039714 Unknown status Vitamin D Levels and Postoperative Hypocalcemia After Total Thyroidectomy December 2009 May 2010
NCT03158155 Unknown status Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency. July 15, 2017 July 18, 2018
NCT03162406 Unknown status N/A Effects of Vitamin D Supplementation During a Non-surgical Treatment of Generalized Chronic Periodontitis May 18, 2017 June 30, 2018
NCT01672047 Unknown status N/A Effect of Vitamin D Supplementation on Coronary Calcification and Parathyroid Hormone in CKD Patients April 2012 December 2015
NCT03882099 Unknown status Vitamin D Level and Its Relation to Pre-eclampsia and Eclampsia March 17, 2019 October 2019
NCT02598635 Unknown status Phase 4 Effects of Cholecalciferol on Osteoprotegerin Levels in Patients on Peritoneal Dialysis October 2015 June 2017
NCT04179370 Unknown status Vitamin D and Health Status of British African-Caribbean Women February 7, 2020 June 2021
NCT04309058 Unknown status Early Phase 1 Observation of the Effect of Vitamin D Supplementation on Chronic Course of Patients With Ulcerative Colitis Based on Vitamin D Receptor Fok I Gene Polymorphism March 2020 March 2021
NCT05260255 Unknown status N/A Effect of Vitamin D Supplement on Disease Activity in SLE June 15, 2021 December 1, 2022
NCT01705522 Unknown status Multimodal Approach in IBD Patients October 2012 October 2019
NCT05276960 Unknown status Phase 4 Efficacy of Intensive Cholecalciferol Monitoring and Supplementation on Serum vitD Levels in Pediatric Patients With CF February 22, 2022 September 30, 2023
NCT03232216 Unknown status N/A Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate? November 21, 2017 August 18, 2023
NCT02594579 Unknown status Phase 3 Effect of Vitamin D3 Supplementation on Muscle Mass in ICU Patient October 2015 December 2016
NCT03876704 Unknown status Phase 3 Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight Infants January 29, 2019 December 31, 2020
NCT00752401 Unknown status Phase 3 Vitamin D3 Substitution in Vitamin D Deficient Kidney Transplant Recipients May 2009 July 2014
NCT01754961 Unknown status Phase 2 Effects of Vitamin D on Inflammation in Liver Disease November 2011 January 2014
NCT03829943 Unknown status Vitamin D and Human Sperm DNA Fragmentation March 21, 2019 February 2022
NCT00306410 Unknown status Phase 2 The Prevalence of Vitamin D Deficiency and Effects of Vitamin D Supplementation in HIV-1 Infected Patients January 2006 July 2007
NCT01807845 Unknown status N/A Bioavailability of Vitamin D Encapsulated in Casein Micelles, Compared to Its Bioavailability in a Synthetic Emulsifier Currently Used for Supplementation and Enrichment. January 2013 December 2013
NCT03289637 Unknown status N/A Supplementation With Vitamin D to Patients With Heart Failure (D-Heart). February 1, 2018 February 1, 2020
NCT05384574 Unknown status N/A Vitamin D Supplementation and Clinical Outcomes in Severe COVID-19 Patients November 22, 2021 July 2022
NCT04389424 Unknown status Relationship Between Body Composition, Food Consumption, and Micro and Macronutrients With Gene Expression in Breast Cancer September 1, 2017 January 30, 2022
NCT02551835 Unknown status Vitamin D Supplements on Markers for Cardiovascular Disease and Diabetes: an Individual Participant Data Meta-analysis April 2015 August 2016
NCT03586947 Unknown status N/A Association Between Vitamin D and the Risk of Uterine Fibroids September 15, 2018 July 1, 2021
NCT04404842 Unknown status Development of a Screening Tool for the Risk of Vitamin D Deficiency January 14, 2020 January 31, 2022
NCT04916925 Unknown status Phase 1/Phase 2 Effect of Vitamin D Oral Supplementation in Poly Csytic Ovarian Women Resistant to Clomiphene Citrate August 21, 2021 December 1, 2021
NCT05389943 Unknown status Phase 1 The Effect of Vitamin D3 Therapy in Post Menopausal Women and Assessment of Changes in Bone Mineral Density After Orally Vitamin D3 Administration June 5, 2022 November 15, 2022
NCT04412694 Unknown status Phase 4 The Effect of Preoperative Oral Dexamethasone Supplementation on the Outcome of Thyroidectomised Patients. July 1, 2020 December 2022
NCT05394207 Unknown status N/A Evaluation Of The Effect Of L. Casei DG® On Vitamin D Absorption In Patients Under Vitamin D Supplementation. June 2023 June 2024
NCT04906161 Unknown status Vitamin D and Serum Calcium Level Insufficiency and Early Dental Implant Failure January 20, 2021 June 30, 2022
NCT03718182 Unknown status Phase 4 Can Vitamin D Supplementation in People With Crohn's Disease Improve Symptoms as an Adjunct Therapy? September 17, 2019 December 31, 2020
NCT05415254 Unknown status N/A Calcitriol Supplementation in COVID-19 Patients June 12, 2022 September 19, 2022
NCT01038453 Unknown status N/A Effects of Vitamin D Supplement Before and During Pregnancy on Birth Weight December 2009 December 2011
NCT04476680 Unknown status N/A Influence of Military Preventive Policy for reCruit Training on COVID-19 Seroconversion September 1, 2020 April 28, 2021
NCT03594214 Unknown status Prognostic Value of Vitamin D Levels in Egyptian Females With Breast Cancer September 1, 2018 September 1, 2021
NCT05419973 Unknown status Vitamin D Levels in Umbilical Cord and It's Impact on Infant and Children's Health (VITADi Study) May 15, 2022 March 2023
NCT03391245 Unknown status Vitamin D Level and Risk of Infections in Cirrhotic Patients August 1, 2017 February 15, 2018
NCT02005302 Unknown status Phase 4 Optimizing Treatment Programs for Chronic Kidney Disease-mineral and Bone Disorder and Malnutrition January 2013 December 2016
NCT03399357 Unknown status Evaluation of Metabolic Predictors of Influenza Vaccine Immune Response in the Singapore Elderly Population - the DYNAMIC Trial May 31, 2017 February 28, 2019
NCT03602261 Unknown status Phase 2 Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI July 9, 2018 March 31, 2023
NCT03405207 Unknown status Phase 2 Vitamin D Deficiency Treatment Outcomes After Non-ST-Segment Elevation Myocardial Infarction May 1, 2018 August 1, 2019
NCT02054975 Unknown status N/A Vitamin D in Pediatric Asthma: a Randomized Controlled Open-label Pilot Trial January 2014 January 2016
NCT01153243 Unknown status Phase 4 Vitamin D and Inflammatory Markers of Cardiovascular Disease in African Americans With Type 2 Diabetes April 2007 June 2011
NCT02087683 Unknown status N/A Effect of Vitamin D Supplementation in Patients With Heart Failure and Vitamin D Deficiency November 2014 December 2018
NCT04778865 Unknown status N/A Effect of Treatment for Vitamin D Deficiency on Thyroid Function and Autoimmunity in Hashimoto's Thyroiditis. November 20, 2020 December 2021
NCT00548379 Unknown status Phase 3 Kabul Vitamin D Supplementation Trial November 2007 July 2009
NCT02243800 Unknown status Phase 3 Study of the Efficacy and Safety of Cholecalciferol Supplementation on the Activity of Rheumatoid Arthritis in Patients With Vitamin D Deficiency November 2011 August 2016
NCT03053414 Withdrawn N/A Vitamin D Repletion and Maintenance in IBD: How Much and How Often February 20, 2017 December 1, 2018
NCT02743559 Withdrawn N/A Does Vitamin D Alter Bone's Response to Vibration? May 19, 2016 March 1, 2018
NCT03063190 Withdrawn Phase 4 Cholecalciferol Supplementation in Restless Leg Syndrome in Patients With Chronic Kidney Disease March 31, 2022 March 2023
NCT01170507 Withdrawn Phase 1/Phase 2 Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation December 2011 August 2016
NCT02422784 Withdrawn Phase 1 Effects of Vitamin D Fortification on Vitamin D Metabolite Profiles and Status in Vitamin D Insufficient Individuals July 2016 June 2018
NCT00279461 Withdrawn Phase 2 Vitamin D Deficiency Causes Immune Dysfunction and Enables or Perpetuates the Development of Rheumatoid Arthritis May 2009 May 2011
NCT02174718 Withdrawn N/A Evaluation of a Transdermal Vitamin D3 Delivery System, D3forME November 2015 November 2017
NCT00948740 Withdrawn Phase 2/Phase 3 The Effect of Vitamin D on Urinary Calcium Excretion in Kidney Stone Formers With High Urinary Calcium August 2009 June 2010
NCT02138591 Withdrawn Phase 3 Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Major Surgical Procedures. February 2016 May 2016
NCT00762918 Withdrawn Phase 3 Vitamin D3 for the Treatment of Low Vitamin D in Cystic Fibrosis March 2008 September 2008
NCT01107808 Withdrawn N/A Calcium, Vitamin D and Metformin to Treat Insulin Resistance in Obese African American Adolescent Females June 2009 March 2011
NCT01633658 Withdrawn N/A The Variability of 25-hydroxyvitamin D Response From Crystalline 25-hydroxyvitamin D3 November 2012 November 2013
NCT05650268 Withdrawn N/A Effects of Stoss Therapy of Vitamin D3 on Peri-operative Outcomes in Patients Receiving General Surgery September 1, 2021 April 30, 2022
NCT01026363 Withdrawn N/A hCAP18 Levels and Vitamin D Deficiency in Chronic Kidney Disease December 2009 December 2014
NCT03019120 Withdrawn Phase 2 Vitamin D Supplementation and Neurocognition January 15, 2017 February 24, 2020
NCT00915317 Withdrawn Effect of Vitamin D Supplementation on Erythropoietin Dosage in Hemodialysis Patients Who Have Vitamin D Deficiency October 2008 March 2009
NCT01329666 Withdrawn Phase 2/Phase 3 Primary Hyperparathyroidism (PHPT): Early Effect of Vitamin D May 2010 January 2015
NCT04363840 Withdrawn Phase 2 The LEAD COVID-19 Trial: Low-risk, Early Aspirin and Vitamin D to Reduce COVID-19 Hospitalizations May 2020 December 2020
NCT02209168 Withdrawn Differences in Ovarian Reserve Markers and Vitamin D Between Infertile Indian, Arabian and Caucasian Population November 2015 March 2019
NCT00552630 Withdrawn Phase 2/Phase 3 Penicillamine Chelation for Children With Lead Poisoning September 2007
HPO Human Phenotype ID (Human Phenotype Ontology)
HP:0100512
MedGen concept unique identifier (MedGen Concept name)
C0042870
MedGen unique identifier (MedGen Concept name)
12114
ICD10 preferred id (Insert disease from ICD10)
D0003801
ICD10 class code (Insert disease from ICD10)
E55
MeSH unique ID (MeSH (Medical Subject Headings))
D014808