Vitamin D intervention -100 active clinical trials as of May 2018

US Clinical Trials list below

• Dose-dependent Effects of Vitamin D on Bone Health
• Randomized Trial: Maternal Vitamin D Supplementation to Prevent Childhood Asthma (VDAART)
• Impact of Vitamin D Supplementation on Cardiac Structure and Function
• To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans
• Vitamin D Replacement After Kidney Transplant
• Vitamin D, Insulin Resistance, and Cardiovascular Disease
• Vitamin D for Sickle-cell Respiratory Complications
• Central Sensitization in Vitamin D Deficiency
• The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates
• Vitamin D and Type 2 Diabetes Study
• High-dose Vitamin D Supplementation for ADT-induced Side Effects
• Vitamin D and Muscle Function Study
• Vitamin D Retrospective Study and Role With Disease
• Vitamin D Supplementation in Warfighters
  • 5,000 IU daily for 3 months - might be enough
• Randomized Study of Two Vitamin D Dosing Strategies in Children With Chronic Kidney Disease
• The Granheim COPD Study - Vitamin D and Strength Training
• Vitamin D Status Impacts Inflammation and Risk of Infections During Pregnancy
• Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function
  • 1,600 IU - probably not enough
• A Study of Combined Deferasirox, Vitamin D and Azacytidine in High Risk MDS
• Role of Vitamin D in the Prevention and Treatment of Diseases Associated With Insulin Resistance
• Effect of Vitamin D3 Supplementation on Cardiometabolic Risk
• Sunshine 2 Study for Women With Diabetes
• Trial of Vitamin D in HIV Progression, Birth Outcomes, and Child Health
• Change in Free 25(OH)D After High Dose in Vitamin D Deficient Postmenopausal Women
• A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women
• Vitamin D and Fish Oil for Autoimmune Disease, Inflammation and Knee Pain
• Effects of Vitamin D Replacement in Patients With Primary Hyperparathyroidism (PHPT)
• Finnish Vitamin D Trial (FIND)
• Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D
• The Impact of Severe Vitamin D Deficiency and Its Correction on Bone Mineral Density (BMD) in Postmenopausal Women
• Genetic, Dietary and Environmental Influences on Vitamin D Metabolism
• Effects of Vitamin D and Fish Oil on the Kidney in Hypertensives
• Maternal Vitamin D for Infant Growth (MDIG) Trial
• Study of Vitamin D in Untreated Metastatic Colorectal Cancer
• Trial of Vitamin D in HIV Progression
• Vitamin D Suplementation in TB Prevention
  • 14,000 IU weekly - might be enough
• Vitamin D Supplementation During Pregnancy for Prevention of Asthma in Childhood
• Effect of Milk Protein and Prebiotics in Combination With Vitamin D on Innate Immunity in Elderly People
• Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)
• Wheezing in Black Preterm Infants: Impact of Vitamin D Supplementation Strategy
• GAD-Alum (Diamyd) Administered Into Lymph Nodes in Combination With Vitamin D in Type 1 Diabetes (DIAGNODE-1)
• Optimizing Vitamin D Status During Initial Military Training
• Vitamin D, Cardiovascular Disease, and African Americans
• Vitamin D and Breast Cancer Biomarkers in Female Patients
• Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills
• Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function
• Vitamin D3 Supplementation for Low-Risk Prostate Cancer: A Randomized Trial
• Vitamin D and Omega-3 Trial (VITAL)
• VITAL-DEP: Depression Endpoint Prevention in the VITamin D and OmegA-3 TriaL
• Safety, Feasibility and Efficacy of Vitamin D Supplementation in Women With Metastatic Breast Cancer (SAFE-D)
• VITamin D and OmegA-3 TriaL: Effects on Bone Structure and Architecture
• Vitamin D and Omega-3 Fatty Acids (VITAL Trial): Effects on Fractures
• Vitamin D Effect on Subarachnoid Hemorrhage
• A Large Randomized Trial of Vitamin D, Omega-3 Fatty Acids and Cognitive Decline
• Age-related Macular Degeneration (AMD) in the Vitamin D and Omega-3 Trial (VITAL)
• Vitamin D and Omega-3 Hypertension Trial (VITAL Hypertension)
• Serum 25(OH) Vitamin D and Total Serum Immunoglobulin E Levels in Patients With Pityriasis Alba
• Efficacy and Safety of KRN23 Versus Oral Phosphate and Active Vitamin D Treatment in Pediatric Patients With X Linked Hypophosphatemia (XLH)
• Vitamin D Dynamics in Women
• Intervention With Vitamin D and Omega-3 Supplements and Incident Heart Failure
• Vitamin D Supplementation in Obesity and Weight Loss (3DD Study)
• VITAL Rhythm Study
• Vitamin D Deficiency and Postoperative Hypocalcemia
• LungVITamin D and OmegA-3 Trial (lungVITAL)
• Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers
• Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy
• Effect of Alendronate on Bone in People With Chronic Spinal Cord Injury Previously Treated With Teriparatide
• Fixation Using Alternative Implants for the Treatment of Hip Fractures (FAITH-2)
• Bone Mass and Strength After Kidney Transplantation
• EDCR Study - Etanercept Diamyd Combination Regimen -Open Trial to Evaluate Safety in Children With Type 1 Diabetes
• Vitamin D and Preeclampsia
• Vitamin D and the Free Hormone Hypothesis
• Vitamin D Receptor Polymorphisms and Non-Melanoma Skin Cancer Risk
• Vitamin D Supplementation And Varicella Zoster Virus Vaccine Responsiveness In Older Long-Term Care Residents
• Vitamin D and Angiogenic Markers in Odense Child Cohort 1
• Effectiveness of Bazedoxifene for Prevention of Glucocorticoid-induced Bone Loss in RA Patients
• Phase II Pre-operative Vitamin D Supplementation to Prevent Post-thyroidectomy Hypocalcemia
• DIagnostics, Fatty Acids and Vitamin D in SCA
• Vitamin D Supplementation After Parathyroid Surgery
• Mussel Intake and Vitamin D Status in Humans
• Vitamin D, Steroids, and Asthma in African American Youth
• Intravenous Paricalcitol in Chronic Hemodialysis Patients
• Randomized Controlled Trial of Neo-adjuvant Progesterone and Vitamin D3 in Women With Large Operable Breast Cancer and Locally Advanced Breast Cancer
• The International Polycap Study 3 (TIPS-3)
• To Test the Effect of Calcifediol Hy.D Supplementation on Muscle Function and Bone Quality in Younger Postmenopausal Women With Osteopenia
• Stem Cell Recruitment in Osteoporosis Therapy
• The Importance of Additional Protein to Benefit More From Training During and After Hospitalization
• Curcumin and Cholecalciferol in Treating Patients With Previously Untreated Stage 0-II Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma
• Human Intervention Study to Increase 25-hydroxyvitamin D Levels
• Cyclic Versus Daily Teriparatide on Bone Mass
• Effect of Caloric Restriction and Protein Intake on Metabolism and Anabolic Sensitivity
• The Vitamin D and Fetal Bone Length Study (VITFBL)
• Study of Effect of Calcifediol Supplementation on Cardiopathic Subjects Undergoing Major Orthopedic Surgery
• A Study on the Impact of Calcium on Woman's Vascular Health
• The D-BIICEP Study
• Effect of CTAP101 Capsules on Ca/iPTH in Advanced Breast/Prostate Cancer Patients Treated With Denosumab/Zoledronic Acid
• Impact of Pre-pregnancy Micronutrient Supplementation on Maternal and Child Outcomes
• The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults
• Comparative Effects of Moxonidine on Bone Metabolism, Vascular and Cellular Aging in Hypertensive Postmenopausal Women
• CYP3A4 Induction and Mineral Homeostasis

There are also 316 Studies which are not yet active:
Recruiting,
Not yet recruiting,
Enrolling by invitation