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
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
Post-approval studies (Phase 4)Study completedNCT03035084What this trial is testingIs Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?Who this might be right forVitamin D Deficiency25-Hydroxyvitamin D Concentration King Faisal Specialist Hospital & Research Center 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
Large-scale testing (Phase 3)Study completedNCT01909622What this trial is testingTrial of Vitamin D Fortified MilkWho this might be right for25-hydroxyvitamin D Serum Concentrations University of Michigan 80
Not applicableStudy completedNCT03310242What this trial is testingComparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D LevelsWho this might be right forVitamin D DeficiencyCardiometabolic Risk Factors Seoul National University Hospital 150
Large-scale testing (Phase 3)Study completedNCT02920502What this trial is testingEffect of a One Time Dose of Cholecalciferol on Serum Concentration of 25-Hydroxyvitamin D and MacrophagesWho this might be right forInflammation University Hospitals Cleveland Medical Center 24
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
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 completedNCT02212223What this trial is testingMarwo-D Research -Need for Vitamin D in Different Population GroupsWho this might be right forSerum 25-hydroxyvitamin D Concentrations (25OHD) University of Helsinki 147
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
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