Not applicableStudy completedNCT05541094What this trial is testingStudy of Vitamin D Fortification of Milk and OilWho this might be right forHealthy Individuals Dr. Anuradha Khadilkar 448
Early research (Phase 1)Ended earlyNCT04386811What this trial is testingVitamin D as a Therapeutic Adjunct in the Stimulant Treatment of ADHD: a Proof-of-concept Tele-health Study of Stimulant-induced Improvement in Neurocognitive Functioning.Who this might be right forADHD Yale University 3
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
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 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
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
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 applicableLooking for participantsNCT07641075What this trial is testingEffects of High-Dose Vitamin D on Hormones, Neuromuscular Function, Cognition, and Body Composition in AthletesWho this might be right forVitamin D 25-Hydroxylase DeficiencyVitamin D Deficiency/Insufficiency The Jerzy Kukuczka Academy of Physical Education in Katowice 200
Post-approval studies (Phase 4)Study completedNCT01845142What this trial is testingImmunologic Action of a Single Dose CholecalciferolWho this might be right forVitamin D Deficiency Margitta Worm 40
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
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 applicableStudy completedNCT01102751What this trial is testingSerum FGF-23 and Vitamin D DeficiencyWho this might be right forOsteomalacia Istanbul University
Not applicableUnknownNCT05018988What this trial is testingVitamin D in School ChildrenWho this might be right forVitamin D DeficiencyMusculoskeletal DiseasesCognitive Delay, Mild University of Ulster 118
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 completedNCT05452512What this trial is testingMedication Adherence Monitoring Trial Using Smart Clinical Trial Application and Smart WatchWho this might be right forCompliance, Medication Seoul National University Hospital 16
Early research (Phase 1)Study completedNCT03103750What this trial is testingVitamin D as a Therapeutic Adjunct in the Stimulant Treatment of ADHDWho this might be right forADHD Yale University 24
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 applicableLooking for participantsNCT07099586What this trial is testingVitamin B12, Folic Acid, and Vitamin D Status in Women of Reproductive AgeWho this might be right forVitamin d, Vitamin B 12 and Folic Acid ConcentrationsMicronutrient Status in Women of Reproductive AgeVitamin Status Assessment University of Mostar 360
Not applicableLooking for participantsNCT07743918What this trial is testingVitamin D Status and Clinical Outcomes in Locally Advanced Cervical CancerWho this might be right forLocally Advanced Cervical CancerVitamin D Concentration University of Kragujevac 100
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