Crick
HomeTrialsGenesDrugs23andMeGraphBlogContact
  • Home
  • Trials
  • Genes
  • Drugs
  • 23andMe
  • Graph
  • Blog
  • Contact
Crick

An open-source clinical intelligence platform. Explore clinical trials, gene networks, and molecular structures using public data sources.

Data Sources

  • ClinicalTrials.gov
  • OpenTargets
  • ClinVar
  • PubChem

Links

  • Contact
  • About
  • Privacy

© 2026 Crick. All rights reserved.

Crick is for educational purposes only. Not medical advice.

Results for “Vitamin D Concentration”

39 trials

Filters

Phase
Early Phase 1
Phase 1
Phase 2
Phase 3
Phase 4
Status
Recruiting
Active, Not Recruiting
Not Yet Recruiting
Completed
Enrolling by Invitation

Showing 20 of 39 results

Very early researchStudy completedNCT02445066
What this trial is testing

A Pilot Study to Examine the Effects of Vitamin D Supplementation on Mitochondrial Bioenergetics in Older Adults

Who this might be right for
Low 25-hydroxyvitamin D Concentrations
Wake Forest University Health Sciences 15
Not applicableStudy completedNCT01926808
What this trial is testing

Vitamin D Serum Concentrations & Supplementation in Children With Cerebral Palsy

Who this might be right for
Vitamin D Deficiency
Akron Children's Hospital 115
Not applicableNot Yet RecruitingNCT06921720
What this trial is testing

Phosphorus-31 Spectroscopy in Phosphate Diabetes

Who this might be right for
Phosphate DiabetesX-linked Hypophosphatemia
Hospices Civils de Lyon 65
Large-scale testing (Phase 3)Study completedNCT02920502
What this trial is testing

Effect of a One Time Dose of Cholecalciferol on Serum Concentration of 25-Hydroxyvitamin D and Macrophages

Who this might be right for
Inflammation
University Hospitals Cleveland Medical Center 24
Not applicableStudy completedNCT05214027
What this trial is testing

The Effect of an Acute Bout of Exercise on Serum Vitamin D Concentration

Who this might be right for
Vitamin DAcute Exercise
University of Bath 34
Testing effectiveness (Phase 2)Study completedNCT03310307
What this trial is testing

Vitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive Women

Who this might be right for
HomocystinaemiaVitamin D Deficiency
Al-Balqa Applied University 100
Not applicableStudy completedNCT03403647
What this trial is testing

Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients

Who this might be right for
Vitamin D Deficiency
Sheba Medical Center 11
Post-approval studies (Phase 4)Study completedNCT02158598
What this trial is testing

Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills

Who this might be right for
Vitamin D Deficiency
CHU de Quebec-Universite Laval 38
Early research (Phase 1)Study completedNCT02063334
What this trial is testing

The Effect of a High-dose Oral Vitamin D3 Bolus on Serum 25(OH)D3 and Vitamin D Receptor Target Gene Expression

Who this might be right for
Vitamin D Receptor Target Gene ExpressionSerum 25(OH)D Concentration
University of Eastern Finland 35
Post-approval studies (Phase 4)Study completedNCT02186106
What this trial is testing

Dosage Calculation for Vitamin D Treatment

Who this might be right for
Deficiency, Vitamin DObesity
Bispebjerg Hospital 31
Early research (Phase 1)Ended earlyNCT04386811
What this trial is testing

Vitamin 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 for
ADHD
Yale University 3
Not applicableLooking for participantsNCT07100795
What this trial is testing

Vitamin B12, Folic Acid and Vitamin D Status in Women of Reproductive Age

Who this might be right for
Vitamin D, Vitamin B 12 and Folic Acid ConcentrationsMicronutrient Status in Women of Reproductive AgeVitamin Status Assessment
University of Mostar 360
Not applicableStudy completedNCT02495584
What this trial is testing

D-Light Intervention

Who this might be right for
25-hydroxyvitamin D Concentration (Vitamin D Status)
University of Ulster 52
Not applicableStudy completedNCT05601271
What this trial is testing

Effect of Allopurinol on Markers of Mineral and Bone Metabolism

Who this might be right for
Chronic Kidney DiseasesOsteodystrophyUric Acid Concentration, Serum, Quantitative Trait Locus 7
University of Sao Paulo General Hospital 50
Post-approval studies (Phase 4)Study completedNCT01741181
What this trial is testing

Vitamin D Supplementation in Patients With Diabetes Mellitus Type 2

Who this might be right for
Diabetes Mellitus Type 2Vitamin D Deficiency
Tan Tock Seng Hospital 64
Not applicableUnknownNCT05018988
What this trial is testing

Vitamin D in School Children

Who this might be right for
Vitamin D DeficiencyMusculoskeletal DiseasesCognitive Delay, Mild
University of Ulster 118
Early research (Phase 1)Study completedNCT03103750
What this trial is testing

Vitamin D as a Therapeutic Adjunct in the Stimulant Treatment of ADHD

Who this might be right for
ADHD
Yale University 24
Post-approval studies (Phase 4)Study completedNCT01924910
What this trial is testing

A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults

Who this might be right for
Vitamin D Deficiency
Emory University 28
Not applicableNot Yet RecruitingNCT07146555
What this trial is testing

Vitamin D Satus in Adults With Newly Diagnosed ITP

Who this might be right for
Vitamin D Concentration
Assiut University 84
Not applicableStudy completedNCT02150122
What this trial is testing

Dietary Requirement for Vitamin D in Adolescents Aged 14-18 Years

Who this might be right for
Serum 25-hydroxyvitamin D Concentrations (25OHD)
University of Surrey 120
Load More Results