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ClinicalTrials.gov public records Last synced Oct 10, 2026, 12:04 AM EDT

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Showing 49–63 of 63 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D (4000 IU) Clear all

Conditions: Obesity, Glucose Intolerance, Inflammation
Interventions: Placebo, Vitamin D 3 cholecalciferol; Dietary Supplement
Lead sponsor: University of Missouri-Columbia; Other
Eligibility: 9 Years to 19 Years
Enrollment: 44 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2013
U.S. locations: 1
States / cities: Columbia, Missouri

Conditions: Solid Cancers
Interventions: Grape Seed Extract, Vitamin D; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years and older
Enrollment: 22 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2016
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Chronic Kidney Disease
Interventions: cholecalciferol, doxercalciferol, placebo; Dietary Supplement
Lead sponsor: Indiana University; Other
Eligibility: 18 Years and older
Enrollment: 100 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: Indianapolis, Indiana

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: Gestational Diabetes
Interventions: 4000 IU vitamin D3; Drug
Lead sponsor: University of Minnesota; Other
Eligibility: 18 Years and older · Female only
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2020
U.S. locations: 1
States / cities: Minneapolis, Minnesota

Conditions: COVID-19
Interventions: Vitamin D 400IU, Vitamin D 4000IU; Dietary Supplement
Lead sponsor: University of Chicago; Other
Eligibility: 18 Years and older
Enrollment: 2,093 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2020 – 2025
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Asthma
Interventions: vitamin D3 4000 IU, Placebo; Drug
Lead sponsor: Juan Celedon, MD; Other
Eligibility: 6 Years to 16 Years
Enrollment: 192 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2019
U.S. locations: 7
States / cities: San Francisco, California • Denver, Colorado • Boston, Massachusetts + 4 more

Conditions: Crohn's Disease (CD), Ulcerative Colitis (UC)
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: University of California, San Francisco; Other
Eligibility: 18 Years and older
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2013
U.S. locations: 1
States / cities: Fresno, California

Conditions: Gastrointestinal Cancers, Prostate Cancer, Hypertension
Interventions: Vitamin D, Placebo; Drug · Dietary Supplement
Lead sponsor: Dana-Farber Cancer Institute; Other
Eligibility: 30 Years to 80 Years
Enrollment: 328 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2013
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Sarcopenia, Falls
Interventions: vitamin D3, Placebo; Dietary Supplement
Lead sponsor: Tufts University; Other
Eligibility: 65 Years and older · Female only
Enrollment: 24 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency, Falls
Interventions: 200 IU/d cholecalciferol, 1000 IU/d cholecalciferol, 2000 IU/d cholecalciferol, 4000 IU/d cholecalciferol; Dietary Supplement
Lead sponsor: Johns Hopkins University; Other
Eligibility: 70 Years and older
Enrollment: 688 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2015 – 2019
U.S. locations: 2
States / cities: Baltimore, Maryland • Hagerstown, Maryland

Conditions: HIV-1 Infection
Interventions: EFV/FTC/TDF, Calcium Carbonate, Vitamin D3, Placebo for calcium carbonate, Placebo for vitamin D3; Drug
Lead sponsor: Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections; Network
Eligibility: 18 Years and older
Enrollment: 167 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2013
U.S. locations: 38
States / cities: Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 27 more

Conditions: Type 2 Diabetes
Interventions: cholecalciferol, microcrystalline cellulose; Dietary Supplement · Other
Lead sponsor: Tufts University; Other
Eligibility: 40 Years and older
Enrollment: 100 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin D Deficiency, Hepatocellular Carcinoma
Interventions: Vitamin D3 4000 IU, Vitamin D3 2000 IU; Drug
Lead sponsor: Andrea Branch; Other
Eligibility: 18 Years and older
Enrollment: 50 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2013
U.S. locations: 1
States / cities: New York, New York

Conditions: Breast Cancer
Interventions: Vitamin D; Drug
Lead sponsor: Stanford University; Other
Eligibility: 18 Years and older · Female only
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Stanford, California

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Vitamin D to Improve Glucose Metabolism and Reduce Inflammation in Obese Adolescents

Phase I Assay-guided Trial of Anti-inflammatory Phytochemicals in Patients With Advanced Cancer

The Role of Vitamin D in Immune Function in Patients With Chronic Kidney Disease (CKD) Stages 3 and 4.

Vitamin D3 in Systemic Lupus Erythematosus

High Dose Cholecalciferol to Reduce the Incidence of Gestational Diabetes in High Risk Pregnant Women

Can Vitamin D Reduce the Burden of COVID-19?

Vitamin D to Prevent Severe Asthma Exacerbations (Vit-D-Kids Asthma)

Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D

Vitamin D for Chemoprevention

A Pilot Study of the Impact of Vitamin D3 on Muscle Performance in Elderly Women

Study To Understand Fall Reduction and Vitamin D in You

High Dose Vitamin D and Calcium for Bone Health in Individuals Initiating HAART

Vitamin D, Glucose Control and Insulin Sensitivity in African-Americans

The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List

Development of Vitamin D as a Therapy for Breast Cancer - Phase 2