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ClinicalTrials.gov public records Last synced Nov 15, 2026, 8:42 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 416 matching trials from the live ClinicalTrials.gov search.

Filters: Condition: Deficiency Diseases Vitamin Clear all

Conditions: HIV Infections
Interventions: Thiamine hydrochloride, Riboflavin, Ascorbic acid, Vitamin E; Drug
Lead sponsor: National Institute of Allergy and Infectious Diseases (NIAID); NIH
Eligibility: 13 Years and older
Healthy volunteers: Healthy volunteers not accepted
U.S. locations: 4
States / cities: Denver, Colorado • Cleveland, Ohio • Philadelphia, Pennsylvania

Conditions: Obesity, Vitamin D Deficiency
Interventions: Vitamin D3 and Calcium; Dietary Supplement
Lead sponsor: Vadim Sherman, MD; Other
Eligibility: 18 Years to 65 Years · Female only
Enrollment: 37 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2015
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Hypophosphatasia (HPP)
Interventions: asfotase alfa; Biological
Lead sponsor: Alexion Pharmaceuticals, Inc.; Industry
Eligibility: 5 Years to 12 Years
Enrollment: 13 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2010
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: Arthritis, Rheumatoid, Vitamin D Deficiency
Interventions: Placebo in arm A and Vitamin D in arm B, vitamin D 3 for arm A ,and matching placebo for arm B; Drug
Lead sponsor: Indiana University; Other
Eligibility: 18 Years and older
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2011
U.S. locations: 1
States / cities: Indianapolis, Indiana

Conditions: Complications of Bariatric Procedures, Avitaminosis
Interventions: Chewable Multivitamin with Iron, PatchMD Vitamin D3/Calcium Patch, PatchMD Multivitamin Patch, PatchMD B12 Energy Plus Patch, Chewable Calcium, Quick Dissolve B12; Dietary Supplement
Lead sponsor: California State Polytechnic University, Pomona; Other
Eligibility: 18 Years to 65 Years
Enrollment: 30 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2017
U.S. locations: 1
States / cities: Brea, California

Conditions: Osteoporosis, Renal Osteodystrophy, Kidney Transplant; Complications
Interventions: Denosumab Inj 60 mg/ml, Placebo; Drug · Other
Lead sponsor: Thomas Nickolas, MD MS; Other
Eligibility: 18 Years and older
Enrollment: 8 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2021
U.S. locations: 3
States / cities: Chicago, Illinois • Evanston, Illinois • New York, New York

Conditions: Vitamin D Deficiency
Interventions: Cholecalciferol; Dietary Supplement
Lead sponsor: Children's Hospital of Philadelphia; Other
Eligibility: 12 Years to 17 Years
Enrollment: 39 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2012
U.S. locations: 1
States / cities: Philadelphia, Pennsylvania

Conditions: Nephrolithiasis, Urolithiasis, Idiopathic Hypercalciuria, Vitamin D Deficiency, Disorder of Vitamin D
Interventions: Ergocalciferol; Drug
Lead sponsor: New York Presbyterian Hospital; Other
Eligibility: 18 Years and older
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: New York, New York

Conditions: Obesity, Vitamin D Deficiency, Hypertension
Interventions: Vitamin D (cholecalciferol); Dietary Supplement
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 18 Years to 64 Years
Enrollment: 26 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency
Interventions: 400 IU Vitamin D3 (cholecalciferol), 2400 IU Vitamin D3 (cholecalciferol), 6400 IU Vitamin D3 (cholecalciferol); Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years to 45 Years · Female only
Enrollment: 460 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2006 – 2012
U.S. locations: 2
States / cities: Rochester, New York • Charleston, South Carolina

Conditions: Vitamin D Deficiency
Interventions: cholecalciferol, 25(OH)D; Dietary Supplement
Lead sponsor: Creighton University; Other
Eligibility: 20 Years to 60 Years
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2013
U.S. locations: 1
States / cities: Omaha, Nebraska

Conditions: Vitamin D Metabolism is in Chronic Kidney Disease
Interventions: 10,000 IU of cholecalciferol for a total of 8 weeks; Drug
Lead sponsor: Memphis VA Medical Center; Federal
Eligibility: 18 Years to 85 Years · Male only
Enrollment: 70 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Memphis, Tennessee

Conditions: Healthy, Vitamin D Deficiency
Interventions: ergocalciferol, placebo pill; Dietary Supplement · Other
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 9 Years to 18 Years · Female only
Enrollment: 90 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2013
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency
Interventions: Mushroom Vitamin D2, Cholecalciferol, Vitamin D2 - Ergocalciferol, Mushroom Extract; Dietary Supplement
Lead sponsor: Boston University; Other
Eligibility: 18 Years to 64 Years
Enrollment: 80 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2013
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin B6 Deficiency
Interventions: Vitamin B6, Infusion of labeled serine, methionine and leucine; Dietary Supplement · Procedure
Lead sponsor: University of Florida; Other
Eligibility: 20 Years to 40 Years · Female only
Enrollment: 13 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2014
U.S. locations: 1
States / cities: Gainesville, Florida

Conditions: Arterial Dysfunction, Chronic Kidney Disease
Interventions: Cholecalciferol, Calcitriol; Drug
Lead sponsor: University of Colorado, Denver; Other
Eligibility: 18 Years to 80 Years
Enrollment: 128 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2015
U.S. locations: 1
States / cities: Aurora, Colorado

Conditions: Systemic Lupus Erythematosus, SLE, Lupus
Interventions: Vitamin D3, Vitamin D3 placebo; Drug
Lead sponsor: National Institute of Allergy and Infectious Diseases (NIAID); NIH
Eligibility: 18 Years and older
Enrollment: 57 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2011
U.S. locations: 8
States / cities: Birmingham, Alabama • San Francisco, California • Boston, Massachusetts + 5 more

Conditions: Hypovitaminosis D
Interventions: Vitamin D3, Calcium, and Vitamin C; Dietary Supplement
Lead sponsor: Atlantic Health System; Other
Eligibility: 6 Years to 21 Years
Enrollment: 200 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2027 – 2032
U.S. locations: 1
States / cities: Morristown, New Jersey

Conditions: Chronic Kidney Disease, Vitamin D Deficiency
Interventions: Ergocalciferol, Calcitriol; Drug
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 18 Years to 80 Years
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2014
U.S. locations: 1
States / cities: Cambridge, Massachusetts

Conditions: Vitamin D Deficiency, Type 2 Diabetes Mellitus, Cardiovascular Disease
Interventions: Vitamin D3, Calcium carbonate; Dietary Supplement
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 50 Years to 70 Years
Enrollment: 86 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2018
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: Vitamin D Deficiency
Interventions: Not listed
Lead sponsor: Fujirebio Diagnostics, Inc.; Industry
Eligibility: Not listed
Enrollment: 482 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2014 – 2015
U.S. locations: 1
States / cities: Mountain View, California

Conditions: Osteoporosis, Aging
Interventions: Vitamin D3, Calcium Citrate (Citracal); Dietary Supplement
Lead sponsor: Creighton University; Other
Eligibility: 57 Years and older · Female only
Enrollment: 273 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2011
U.S. locations: 1
States / cities: Omaha, Nebraska

Conditions: Hypophosphatemia, Hypophosphatemic Rickets, Pain, Chronic
Interventions: Burosumab; Biological
Lead sponsor: Redwood Dermatology Sciences; Other
Eligibility: Up to 18 Years · Female only
Enrollment: 1 participant
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2019
U.S. locations: 1
States / cities: Clinton, Utah

Conditions: Asthma, Vitamin D Deficiency
Interventions: Vitamin D2 + vitamin D3, Vitamin D3; Drug
Lead sponsor: Nationwide Children's Hospital; Other
Eligibility: 8 Years to 17 Years
Enrollment: 18 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2016
U.S. locations: 1
States / cities: Columbus, Ohio

Search by objective public record fields.

A Study to See if Certain Antioxidants and Vitamins Will Keep Lactate Levels Down in Patients Taking Anti-HIV Drugs

Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients

Safety and Efficacy of Asfotase Alfa in Juvenile Patients With Hypophosphatasia (HPP)

Vitamin D Deficiency Causes Immune Dysfunction and Enables or Perpetuates the Development of Rheumatoid Arthritis

Vitamin Supplementation After Bariatric Surgery

The Effects of 12-months of Denosumab on Bone Density in Prevalent Kidney Transplant Recipients

Vitamin D3 Supplementation Pilot Study

Vitamin D Repletion in Stone Formers With Hypercalciuria

Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity

Establishing the Vitamin D Requirements During Lactation

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

Vitamin D Metabolism in Chronic Kidney Disease Patients

Vitamin D Deficiency in Adolescent Girls

Evaluating Vitamin D Content in Mushrooms

Vitamin B6 Effects for Women Taking Birth Control Pills

Vitamin D and Arterial Function in Patients With Chronic Kidney Disease

Vitamin D3 in Systemic Lupus Erythematosus

The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.

hCAP18 Levels and Vitamin D Deficiency in Chronic Kidney Disease

Vitamin D, Cardiovascular Disease, and African Americans

Study Vitamin D in Healthy Individuals

Vitamin D Supplementation in Older Women

Open Label Trial Assessing Safety and Efficacy of Burosumab (KRN23), in a Patient With ENS and Hypophosphatemic Rickets

Vitamin D in Pediatric Asthma: a Randomized Controlled Open-label Pilot Trial