Not applicableNot Yet RecruitingNCT07146555What this trial is testingVitamin D Satus in Adults With Newly Diagnosed ITPWho this might be right forVitamin D Concentration Assiut University 84
Very early researchStudy completedNCT02445066What this trial is testingA Pilot Study to Examine the Effects of Vitamin D Supplementation on Mitochondrial Bioenergetics in Older AdultsWho this might be right forLow 25-hydroxyvitamin D Concentrations Wake Forest University Health Sciences 15
Early research (Phase 1)Study completedNCT02063334What this trial is testingThe Effect of a High-dose Oral Vitamin D3 Bolus on Serum 25(OH)D3 and Vitamin D Receptor Target Gene ExpressionWho this might be right forVitamin D Receptor Target Gene ExpressionSerum 25(OH)D Concentration University of Eastern Finland 35
Post-approval studies (Phase 4)UnknownNCT04284059What this trial is testingAdjuvant Effects of Vitamin A and Vitamin D Supplementation on Treatment of Children With ADHDWho this might be right forADHD Chen Li 504
Early research (Phase 1)Study completedNCT03537027What this trial is testingEfficiency of Vitamin D3 and 25-hydroxyvitamin D3 on Transcriptomic Changes of Low Vitamin D RespondersWho this might be right forVitamin D Receptor Target Gene ExpressionSerum 25(OH)D Concentration University of Eastern Finland 40
Not applicableNot Yet RecruitingNCT06921720What this trial is testingPhosphorus-31 Spectroscopy in Phosphate DiabetesWho this might be right forPhosphate DiabetesX-linked Hypophosphatemia Hospices Civils de Lyon 65
Not applicableStudy completedNCT02525003What this trial is testingThe BreaD Study - Bio-availability of D2 Vitamin Present in BreadWho this might be right forSerum 25-hydroxyvitamin D Concentrations (25OHD) University of Helsinki 41
Not applicableStudy completedNCT01102751What this trial is testingSerum FGF-23 and Vitamin D DeficiencyWho this might be right forOsteomalacia Istanbul University
Not applicableStudy completedNCT01926808What this trial is testingVitamin D Serum Concentrations & Supplementation in Children With Cerebral PalsyWho this might be right forVitamin D Deficiency Akron Children's Hospital 115
Not applicableStudy completedNCT05214027What this trial is testingThe Effect of an Acute Bout of Exercise on Serum Vitamin D ConcentrationWho this might be right forVitamin DAcute Exercise University of Bath 34
Large-scale testing (Phase 3)UnknownNCT03691896What this trial is testingCalcium (ca),Phosphorus( P) and 25-hydroxyvitamin D(25OHD)] in Infants Born ≤ 32 PMA Gestational Weeks (GA)Who this might be right forInfant, Premature, Diseases Centre of Postgraduate Medical Education 200
Not applicableNot Yet RecruitingNCT07349459What this trial is testingCardioprotective Effect of Melatonin Versus Vitamin D in Breast Cancer Patients Receiving DoxorubicinWho this might be right forMelatoninBreast Cancer Patients DiagnosedVitamin D Concentration+1 more Tanta University 90
Not applicableStudy completedNCT02460211What this trial is testingAcute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin DWho this might be right forCardiovascular DiseaseVitamin D Deficiency Intermountain Health Care, Inc. 150
Post-approval studies (Phase 4)Study completedNCT01924910What this trial is testingA Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy AdultsWho this might be right forVitamin D Deficiency Emory University 28
Not applicableStudy completedNCT02495584What this trial is testingD-Light InterventionWho this might be right for25-hydroxyvitamin D Concentration (Vitamin D Status) University of Ulster 52
Not applicableUnknownNCT05018988What this trial is testingVitamin D in School ChildrenWho this might be right forVitamin D DeficiencyMusculoskeletal DiseasesCognitive Delay, Mild University of Ulster 118
Testing effectiveness (Phase 2)Study completedNCT03310307What this trial is testingVitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive WomenWho this might be right forHomocystinaemiaVitamin D Deficiency Al-Balqa Applied University 100
Not applicableStudy completedNCT02150122What this trial is testingDietary Requirement for Vitamin D in Adolescents Aged 14-18 YearsWho this might be right forSerum 25-hydroxyvitamin D Concentrations (25OHD) University of Surrey 120
Post-approval studies (Phase 4)UnknownNCT01386736What this trial is testingVitamin D and Glucose Metabolism in PediatricsWho this might be right forInsulin ResistanceObesityVitamin D25 Insufficiency Weill Medical College of Cornell University 110
Not applicableStudy completedNCT02334592What this trial is testingVitamin D Production Levels Achieved by Sunbed TanningWho this might be right forHealthy Vitamin D Society 87