Vitamin D: all 520 studies that test it

Page 3 of 6. Open to participants first (50), then studies with results posted, then the rest; newest registration first within each.

• Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel DiseaseCompletedNCT04828031Phase 1
• Low and High Doses of Prophylactic Vitamin D in Prevention of Osteopenia of PrematurityCompletedNCT04768439Phase 2
• The Effect of Probiotics and Vitamin D Supplementation on Sport Performance in MMA Athletes.Status unknownNCT04759729Not applicable
• The Effect of Probiotic Supplementation on SARS-CoV-2 Antibody Response After COVID-19CompletedNCT04734886Not applicable
• Intralesional Vitamin D in Alopecia AreataStatus unknownNCT04660786Phase 1/2
• Efficacy of Vitamin D Treatment in Mortality Reduction Due to COVID-19.CompletedNCT04621058Phase 3
• Vitamin D3 Supplementation to Prevent Respiratory Tract InfectionsCompletedNCT04596657Not applicable
• The Role of Vitamin D, A, and Beta Carotene in Tuberculosis Patients With Vitamin D Receptor Gene PolymorphismCompletedNCT04593524Not applicable
• Trial of Vitamin D to Reduce Risk and Severity of COVID-19 and Other Acute Respiratory InfectionsCompletedNCT04579640Phase 3
• Benign Paroxysmal Positional Vertigo (BPPV) in Older PatientsStatus unknownNCT04578470Phase 2
• High Dose Vitamin D Plus Multivitamin in the Prevention of Cluster HeadacheTerminatedNCT04570475Not applicable
• Effect of Vitamin D Supplementation in Live Birth Rate of in Vitro Fertilization OutcomeStatus unknownNCT04547530Phase 4
• The Association of Vitamin D Supplementation With the Outcome in Critically Ill ChildrenCompletedNCT04536831Phase 4
• Vitamin D for COVID-19 TrialCompletedNCT04536298Phase 3
• Effect of Vitamin d Deficiency in Chronic Rhinosinusitis With Nasal PolyposisStatus unknownNCT04529668Phase 1
• PRevention of COVID-19 With Oral Vitamin D Supplemental Therapy in Essential healthCare TeamsTerminatedNCT04483635Phase 3
• Influence of Military Preventive Policy for reCruit Training on COVID-19 SeroconversionStatus unknownNCT04476680Not applicable
• Vitamin D in Egyptian Children With Atopic DermatitisCompletedNCT04468711Phase 3
• Short Term, High Dose Vitamin D Supplementation for COVID-19CompletedNCT04459247Not applicable
• Vitamin D Supplementation in Patients With COVID-19CompletedNCT04449718Not applicable
• Vitamin D Regulates the Expression of Glucocorticoid Receptors in Blood of Severe Asthmatic PatientsCompletedNCT04443387Not applicable
• Cholecalciferol to Improve the Outcomes of COVID-19 PatientsCompletedNCT04411446Phase 4
• Vitamin D Supplementation in CKD - Vascular Function, Structure and Immune RegulationCompletedNCT04380467Not applicable
• High vs Low Dose Vitamin D in Patients With Diabetic Peripheral NeuropathyCompletedNCT04377399Phase 4
• Efficacy of Oral Vitamin D Supplementation in Adolescents and Young Adults.CompletedNCT04377386Not applicable
• The LEAD COVID-19 Trial: Low-risk, Early Aspirin and Vitamin D to Reduce COVID-19 HospitalizationsWithdrawnNCT04363840Phase 2
• Vitamin D as a Key Player in Rheumatoid ArthritisCompletedNCT04344405Phase 3
• Vitamin D on Prevention and Treatment of COVID-19Status unknownNCT04334005Not applicable
• Observation of the Effect of Vitamin D Supplementation on Chronic Course of Patients With Ulcerative Colitis Based on Vitamin D Receptor Fok I Gene PolymorphismStatus unknownNCT04309058Early Phase 1
• Exploring the Effects of Vitamin D Supplementation on the Chronic Course of Patients With Crohn's Disease With Vitamin D DeficiencyStatus unknownNCT04308850Early Phase 1
• Vitamin D Oral Gel for Prevention of Radiation Induced Oral MucositisStatus unknownNCT04308161Phase 2
• Different Treatment Modalities in the Management of the Painful Crisis in Pediatric Sickle- Cell AnemiaCompletedNCT04301336Phase 2/3
• Adjuvant Effects of Vitamin A and Vitamin D Supplementation on Treatment of Children With ADHDStatus unknownNCT04284059Phase 4
• PRagmatic Analysis of Vitamin D in ANCA-Associated VasculitisCompletedNCT04280601Not applicable
• Short Term Cardiovascular Effects and Oxidative Status of Calcium and Vitamin D Supplementation of Postmenopausal Hypertensive Blacks WomenCompletedNCT04255992Phase 4
• Efficacy and Safety of JMT103 in Patients With Giant Cell Tumor of BoneStatus unknownNCT04255576Phase 1/2
• Preoperative Hypocalcaemia, a Comparative Clinical TrialCompletedNCT04212533Not applicable
• Biological Effect of Vitamin D in Patients With Urothelial CarcinomaCompletedNCT04197089Phase 4
• Effect of Escalating Oral Vitamin D Replacement on HOMA-IR in Vitamin D Deficient Type 2 DiabeticsCompletedNCT04183257Phase 4
• Protective Role of Vitamin D in Breast Cancer Patients Treated With DoxorubicinCompletedNCT04166253Phase 2
• the Effect of Vitamin D in Crohn's DiseaseStatus unknownNCT04134065Early Phase 1
• Vitamin D Supplementation in Knee OsteoarthritisCompletedNCT04121533Not applicable
• Vit D Role in Post Thyroidectomy HypocalcemiaStatus unknownNCT04094493Early Phase 1
• Vitamin D Supplementation to Correct the Vitamin D Deficiency for Breast CancerCompletedNCT04091178Phase 2
• Vitamin D and Pregnancy Outcome in PCOS PatientsCompletedNCT04082650Not applicable
• Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant WomenCompletedNCT04010942Phase 4
• Efficacy of Fractional CO2 Laser as a Mono- or Adjuvant Therapy for Alopecia AreataStatus unknownNCT04003376Phase 4
• A Trial to Evaluate the Effect of Vitamin D Supplementation in Patients With Chronic UrticariaStatus unknownNCT03991845Phase 4
• Vitamin D Can Increase Pathological Response of the Breast Cancer Patients Treated With Neoadjuvant TherapyCompletedNCT03986268Not applicable
• Vitamin D and Hereditary Haemorrhagic TelangiectasiaStatus unknownNCT03981562Phase 2
• Effects of Milk Protein and Vitamin D on Children's Growth and HealthCompletedNCT03956732Not applicable
• Studying the Effect of Methotrexate Alone Versus Methotrexate and Vitamin D on the Cardiovascular Risk of Psoriatic PatientsStatus unknownNCT03904680Phase 4
• Vitamin D Supplementation in PCOS PatientsCompletedNCT03898934Phase 4
• Comparison of Two Different Doses of Vitamin D in Preterm InfantsStatus unknownNCT03889717Not applicable
• Effect of Vitamin D in Burn PatientsStatus unknownNCT03884036Not applicable
• Combined Oral Vitamin D and UVB Versus UVB Alone in Treatment of Psoriasis VulgarisStatus unknownNCT03874975Early Phase 1
• The Vitamin K2 and D3 Intervention Trial in Children and Adolescents With the Low-energy FracturesStatus unknownNCT03871322Not applicable
• Vitamin D Treatment of Diabetic Patients With Foot UlcersCompletedNCT03813927Not applicable
• Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2CompletedNCT03810261Not applicable
• The Effect Of Vitamin D Replacement Therapy On Serum Leptin And Follicular Growth Pattern In Women With Resistant Polycystic OvaryStatus unknownNCT03806036Phase 4
• Different Doses of Vitamin D and T Regulatory Cells in Preterm InfantsCompletedNCT03793309Phase 1
• Vitamin D Supplementation in Patients With DepressionStatus unknownNCT03766074Not applicable
• The Effects of Vitamin D2 Supplement During PregnancyCompletedNCT03743922Not applicable
• The Relationship Between VDR Gene Polymorphism and Children's Physical and Intellectual DevelopmentStatus unknownNCT03742310Not applicable
• Vitamin D Supplementation and Effects on Mood in Emergency Medicine ResidentsCompletedNCT03739671Not applicable
• Effect of Vitamin D Intake in Pregnancy to Prevent Recurrence of Gestational DiabetesStatus unknownNCT03701087Early Phase 1
• Calcium (ca),Phosphorus( P) and 25-hydroxyvitamin D(25OHD)] in Infants Born ≤ 32 PMA Gestational Weeks (GA)Status unknownNCT03691896Phase 3
• Vitamin D Supplementation and WBV in Inflammatory Markers, Strength and Body Composition in Old Patients With COPDStatus unknownNCT03684330Not applicable
• RANKL Inhibition and Breast Tissue BiomarkersCompletedNCT03629717Early Phase 1
• The Effect of Vitamin D3 on Postoperative Pain in Patients Undergoing CraniotomyCompletedNCT03614403Not applicable
• Vitamin D and Immunity: Photosynthesis Versus SupplementationCompletedNCT03609970Not applicable
• Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age.CompletedNCT03544671Not applicable
• Central Sensitization in Vitamin D DeficiencyCompletedNCT03420378Not applicable
• Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted PatientsCompletedNCT03403647Not applicable
• 25-Hydroxyvitamin D Pharmacokinetic StudyCompletedNCT03401541Early Phase 1
• Effect of Vitamin D Supplement in Induction of Ovulation in Overweight Women With Polycystic Ovary SyndromeStatus unknownNCT03396380Phase 3
• Impact of Vitamin D Supplementation in Patients With Multiple SclerosisCompletedNCT03385356Phase 4
• Vitamin D In the Prevention of Viral-induced Asthma in PreschoolersCompletedNCT03365687Phase 3
• Impact of Correction of Vitamin D Deficiency in Oxidative Stress in Patients With Prediabetes (VICOX)TerminatedNCT03356873Not applicable
• Effect of Vitamin D Replacement on Bone Healing in Mini-dental ImplantsStatus unknownNCT03356730Phase 1
• Key Nutrients and Mental HealthCompletedNCT03336125Not applicable
• Vitamin D Supplementation in Physical PerformanceCompletedNCT03325686Not applicable
• Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study)CompletedNCT03318029Not applicable
• Vitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive WomenCompletedNCT03310307Phase 2
• Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D LevelsCompletedNCT03310242Not applicable
• Correlative Analysis of the Genomics of Vitamin D and Omega-3 Fatty Acid Intake in Prostate CancerCompletedNCT03290417Not applicable
• Supplementation With Vitamin D to Patients With Heart Failure (D-Heart).Status unknownNCT03289637Not applicable
• Importance of Dosing Regimen for the Effect of Vitamin D SupplementationCompletedNCT03272126Phase 3
• Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Brain Tumor SurgeryCompletedNCT03248544Not applicable
• Vitamin D Supplementation in Vitamin Deficient Women Undergoing IVF Cycles: Does it Affect the Fertility Outcome?CompletedNCT03209856Phase 4
• Developmental Screening and Nutritional Intervention of Severe Acute Malnourished Children in Southern Punjab, PakistanCompletedNCT03170479Phase 2
• Vitamin D Supplementation in IBSTerminatedNCT03148288Not applicable
• The Correlation Between Anemia of Chronic Diseases, Hepcidin and Vitamin D in IBD PatientsStatus unknownNCT03145896Not applicable
• Vitamin D for Muscle Metabolic Function in Cancer CachexiaCompletedNCT03144128Not applicable
• Oral Vitamin D Substitution Weekly or Monthly and AdherenceCompletedNCT03141593Phase 4
• The Impact of Vitamin D Supplementation on Glucose Metabolism in Chinese Women With Former Gestational Diabetes MellitusStatus unknownNCT03138616Phase 4
• Magnesium and Vitamin D Supplementation and Cardiometabolic OutcomesCompletedNCT03134417Not applicable
• A Study Evaluating Vitamin D in Allergic Bronchopulmonary Aspergillosis Complicating AsthmaCompletedNCT03133299Phase 2/3
• CLA and Vitamin D on Protein TurnoverCompletedNCT03115775Not applicable
• Vitamin D Raising and Maintaining Blood Serum 25(OH)D3 LevelsCompletedNCT03099759Not applicable

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