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
  • Privacy

© 2026 Crick. All rights reserved.

Crick is for educational purposes only. Not medical advice.

Results for “Vitamin A”

1,689 trials

Showing 20 of 1,689 results

Not applicableUnknownNCT02975492
What this trial is testing

Assessing the Impact of a Mode of Vitamin D Supplementation (Sequential Dose vs Daily Dose) on the Incidence of Hypercalciuria in Subjets Aged From 2 to 18 Years

Who this might be right for
Transient Hypercalciuria
University Hospital, Montpellier 280
Testing effectiveness (Phase 2)WithdrawnNCT01170507
What this trial is testing

Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation

Who this might be right for
Vitamin D Deficiency
King Faisal Specialist Hospital & Research Center
Large-scale testing (Phase 3)Study completedNCT00003367
What this trial is testing

Diet and PSA Levels in Patients With Prostate Cancer

Who this might be right for
Prostate Cancer
Memorial Sloan Kettering Cancer Center 154
Testing effectiveness (Phase 2)Ended earlyNCT01968590
What this trial is testing

Vitamin D Supplementation for Adults With Neurofibromatosis Type 1 (NF1)

Who this might be right for
Neurofibromatosis Type 1 (NF1)
University of Utah 26
Post-approval studies (Phase 4)Looking for participantsNCT07791797
What this trial is testing

Supplementation Absorption Comparison

Who this might be right for
Healthy Volunteer
RDC Clinical Pty Ltd 160
Testing effectiveness (Phase 2)Study completedNCT00198718
What this trial is testing

Single-dose Postpartum Vitamin A Supplementation of Mothers and Neonates

Who this might be right for
Vitamin A DeficiencyHIV
Johns Hopkins Bloomberg School of Public Health 28,220
Not applicableStudy completedNCT05024110
What this trial is testing

Effect of Exercise Intensity on Vitamin D

Who this might be right for
Down SyndromeVitamin D Deficiency
Taif University 44
Post-approval studies (Phase 4)Looking for participantsNCT06551337
What this trial is testing

Vitamin D Replacement in Bronchiectasis

Who this might be right for
Bronchiectasis
Queen Mary Hospital, Hong Kong 104
Not applicableStudy completedNCT03602937
What this trial is testing

Evaluation of Renastep

Who this might be right for
Chronic Kidney DiseasesRenal Disease
Vitaflo International, Ltd 20
Large-scale testing (Phase 3)Study completedNCT00198822
What this trial is testing

Impact of Maternal Vitamin A or Beta-Carotene Supplementation on Maternal and Infant Mortality in Bangladesh

Who this might be right for
Vitamin A DeficiencyMaternal MortalityInfant Mortality
Johns Hopkins Bloomberg School of Public Health 59,666
Not applicableStudy completedNCT03166956
What this trial is testing

Effect of Glutamine and Vitamin C on Interleukin-6 and Clinical Outcomes in Surgical Intensive Care Unit Patients

Who this might be right for
Critical Care
Chung Shan Medical University 41
Not applicableUnknownNCT04488731
What this trial is testing

The Effect of Coffee Consumption on the Serum Levels of Leptin, Folic Acid, and Vitamin B12

Who this might be right for
Atherosclerosis
Applied Science Private University 120
Not applicableStudy completedNCT06391437
What this trial is testing

Prevalence Of Vitamin A Deficiency In Critically Ill Children With Sepsis And Its Association With Clinical Outcomes

Who this might be right for
Vitamin A Deficiency in Children
Benha University 220
Post-approval studies (Phase 4)UnknownNCT04419363
What this trial is testing

Burosumab in Children and Adolescents With X-linked Hypophosphatemia

Who this might be right for
Rare DiseasesX-linked Hypophosphatemia
Bicetre Hospital 57
Not applicableEnded earlyNCT01744821
What this trial is testing

Vitamin D for Women at Increased Risk of Developing Ovarian, Fallopian, or Primary Peritoneal Cancer

Who this might be right for
Ovarian CancerFallopian Tube CancerPrimary Peritoneal Cancer
Northwestern University 7
Not applicableStudy completedNCT01191463
What this trial is testing

The Efficacy of a Local Vitamin-C Rich Fruit (Guava) in Improving Iron Absorption From Mungbean Based Meals and Its Effect on Iron Status of Rural Indian Children (6-10 Years)

Who this might be right for
Iron DeficiencyAnemia
Wageningen University 300
Not applicableStudy completedNCT05181839
What this trial is testing

Describe the Lived Experience of XLH for Adolescents at End of Skeletal Growth

Who this might be right for
X-Linked Hypophosphatemia
Kyowa Kirin Pharmaceutical Development Ltd 25
Post-approval studies (Phase 4)Study completedNCT03233295
What this trial is testing

A Prospective, Single-centre, Open-label Study to Confirm the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency

Who this might be right for
Vitamin D Deficiency
Kwang Dong Pharmaceutical co., ltd. 108
Testing effectiveness (Phase 2)Ended earlyNCT02341495
What this trial is testing

Deferasirox, Cholecalciferol, and Azacitidine in the Treatment of Newly Diagnosed AML Patients Over 65

Who this might be right for
Acute Myeloid Leukemia
Elizabeth Henry 4
Post-approval studies (Phase 4)Study completedNCT05842395
What this trial is testing

Vitamin c Supplementation in the Prevention of CRPS Following Distal Radius Fractures

Who this might be right for
Distal Radius FractureVitamine cProphylaxis
Damascus University 220
Next Page

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