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 “Deficiency, Vitamin A”

509 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 509 results

Post-approval studies (Phase 4)Study completedNCT00424619
What this trial is testing

A Randomised, Controlled Comparison of Vitamin D Strategies is Acute Hip Fracture Patients

Who this might be right for
Hip Fracture
McMaster University 64
Post-approval studies (Phase 4)UnknownNCT04627181
What this trial is testing

Do Iron And Vitamin B12 Injections Given Together, Improve Hemoglobin In Patients On Hemodialysis?

Who this might be right for
Iron Deficiency AnemiaB12 Deficiency Anemia
Christian Medical College, Vellore, India 100
Not applicableStudy completedNCT05434377
What this trial is testing

Fixed Dose Versus Serum Level-Based Titration Regimen of Vitamin D Supplementation in Dialysis Patients

Who this might be right for
Vitamin D DeficiencyEnd Stage Renal Disease
Chulalongkorn University 78
Large-scale testing (Phase 3)Study completedNCT01600430
What this trial is testing

Vitamin D Supplementation for Extremely Preterm Infants

Who this might be right for
Vitamin D DeficiencyPreterm InfantsBronchopulmonary Dysplasia
University of Alabama at Birmingham 100
Not applicableStudy completedNCT01816711
What this trial is testing

Vitamin D Levels in Frail Elderly Patients With a Hip Fracture

Who this might be right for
Hip FractureVitamin D Deficiency
University of Aarhus 447
Large-scale testing (Phase 3)Study completedNCT00276198
What this trial is testing

Efficacy Trial to Examine Efficacy of Multimicronutrient Home Supplementation in Infants

Who this might be right for
Iron Deficiency AnemiaInfectious DiseasesUndernutrition
Soroka University Medical Center 771
Not applicableUnknownNCT03391245
What this trial is testing

Vitamin D Level and Risk of Infections in Cirrhotic Patients

Who this might be right for
Vitamin D DeficiencyInfectionLiver Cirrhosis
Assiut University 87
Not applicableStudy completedNCT03773809
What this trial is testing

Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients

Who this might be right for
Asthma-COPD Overlap SyndromeVitamin D DeficiencyCardiac Autonomic Tone
Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh 50
Not applicableEnded earlyNCT01349764
What this trial is testing

Effect of Vitamin D Replacement in Patients With Urolithiasis

Who this might be right for
Urolithiasis
McGill University Health Centre/Research Institute of the McGill University Health Centre 10
Not applicableStudy completedNCT03383744
What this trial is testing

Using Stable Isotopes to Assess the Effectiveness of Vitamin A Supplementation in Cameroon

Who this might be right for
Vitamin A Deficiency
Centre for Food and Nutrition Research, Yaounde 104
Not applicableStudy completedNCT01634607
What this trial is testing

Bone Health and Vitamin D Status

Who this might be right for
OsteopeniaVitamin D DeficiencyHIV Infection
Thai Red Cross AIDS Research Centre 235
Not applicableStudy completedNCT04945577
What this trial is testing

The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection

Who this might be right for
Vitamin D DeficiencyCovid19
Fatih Sultan Mehmet Training and Research Hospital 300
Not applicableEnrolling By InvitationNCT05323292
What this trial is testing

Vitamin A Status in Patients With Vocal Fold Leukoplakia

Who this might be right for
Vitamin AVitamin A DeficiencyLeukoplakia+1 more
University of Wisconsin, Madison 90
Not applicableWithdrawnNCT01633658
What this trial is testing

The Variability of 25-hydroxyvitamin D Response From Crystalline 25-hydroxyvitamin D3

Who this might be right for
Vitamin D Deficiency
Creighton University
Not applicableStudy completedNCT02590848
What this trial is testing

Walnuts, Long-Chain Polyunsaturated Fatty Acids and Adolescent Brain Development

Who this might be right for
Vitamin/Nutritional DeficiencyNeurobehavioral Manifestations
Barcelona Institute for Global Health 730
Large-scale testing (Phase 3)Study completedNCT00092066
What this trial is testing

Evaluate the Safety, Tolerability, and Efficacy of an Investigational Drug and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227)

Who this might be right for
OsteoporosisVitamin D Deficiency
Organon and Co 717
Not applicableStudy completedNCT01552512
What this trial is testing

Nutributter Programming to Prevent Undernutrition: an Evaluation

Who this might be right for
Undernutrition
Washington University School of Medicine 1,228
Not applicableUnknownNCT04438200
What this trial is testing

Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults

Who this might be right for
Vitamin A DeficiencyVitamin A ToxicityHypervitaminosis A
Newcastle University 150
Large-scale testing (Phase 3)Study completedNCT03920072
What this trial is testing

Study of the Anti-FGF23 Antibody, Burosumab, in Adults With XLH

Who this might be right for
X-linked Hypophosphatemia
Kyowa Kirin Pharmaceutical Development Ltd 35
Not applicableUnknownNCT01594541
What this trial is testing

A Retrospective Analysis of Cerefolin NAC® in Cognitively Impaired Patients

Who this might be right for
Mild Cognitive Impairment
Pamlab, Inc. 700
Load More Results