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ClinicalTrials.gov public records Last synced Nov 15, 2026, 9:59 AM EST

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Showing 1–24 of 91 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: 2000 IU vitamin D3 Clear all

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: Cancer, Cardiovascular Disease
Interventions: vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2031
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Diabetes Mellitus, Chronic Kidney Disease, Diabetic Kidney Disease
Interventions: Cholecalciferol, Placebo; Dietary Supplement
Lead sponsor: University of Washington; Other
Eligibility: 18 Years and older
Enrollment: 22 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2007 – 2010
U.S. locations: 1
States / cities: Seattle, Washington

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: 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: Endometriosis
Interventions: Vitamin D3, Fish Oil, Placebo; Dietary Supplement · Other
Lead sponsor: Boston Children's Hospital; Other
Eligibility: 12 Years to 25 Years · Female only
Enrollment: 69 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2016
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Autoimmune Diseases, Systemic Inflammatory Process, Knee Pain Chronic, Osteoarthritis, Rheumatoid Arthritis
Interventions: Fish Oil, Vitamin D, placebo pill; Drug · Dietary Supplement · Other
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2025
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Characteristics That Modify the Response to Cholecalciferol Treatment
Interventions: Vitamin D3, Placebo; Dietary Supplement · Drug
Lead sponsor: University of Washington; Other
Eligibility: 18 Years and older
Enrollment: 666 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2022
U.S. locations: 5
States / cities: Los Angeles, California • Evanston, Illinois • Baltimore, Maryland + 2 more

Conditions: Hypertension, Vitamin D Deficiency, Pre-Hypertension
Interventions: Cholecalciferol; Drug
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 18 Years to 50 Years
Enrollment: 534 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2013
U.S. locations: 3
States / cities: Hartford, Connecticut • Boston, Massachusetts • Minneapolis, Minnesota

Conditions: Aging
Interventions: NT-020, Placebo; Drug · Dietary Supplement
Lead sponsor: University of South Florida; Other
Eligibility: 65 Years to 85 Years
Enrollment: 139 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2011 – 2013
U.S. locations: 1
States / cities: Tampa, Florida

Conditions: Vitamin D Deficiency, HIV
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: University of California, Los Angeles; Other
Eligibility: 18 Years to 90 Years
Enrollment: 122 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Renal Osteodystrophy
Interventions: doxercalciferol, Cholecalciferol; Drug
Lead sponsor: Indiana University; Other
Eligibility: 18 Years to 82 Years
Enrollment: 55 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2009
U.S. locations: 1
States / cities: Indianapolis, Indiana

Conditions: Fractures
Interventions: Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2022
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Cardiovascular Disease
Interventions: Vitamin D3 + fish oil/fish oil placebo, Vitamin D3 placebo + fish oil/fish oil placebo; Dietary Supplement
Lead sponsor: Massachusetts General Hospital; Other
Eligibility: 50 Years and older
Enrollment: 1,025 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2021
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Benign Breast Disease
Interventions: Vitamin D and fish oil placebo, Fish oil and vitamin D placebo, Vitamin D placebo and fish oil placebo, Vitamin D and fish oil; Dietary Supplement
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 55 Years to 67 Years · Female only
Enrollment: 3,894 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2023
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Asthma
Interventions: Cholecalciferol; Dietary Supplement
Lead sponsor: University of Pittsburgh; Other
Eligibility: 6 Years to 14 Years
Enrollment: 48 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2015
U.S. locations: 1
States / cities: Pittsburgh, Pennsylvania

Conditions: Adult Stem Cell Proliferation
Interventions: NutraStem, Placebo; Drug
Lead sponsor: University of North Texas Health Science Center; Other
Eligibility: 50 Years to 70 Years
Enrollment: 23 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013 – 2017
U.S. locations: 1
States / cities: Fort Worth, Texas

Conditions: HIV Infections, AIDS
Interventions: Cholecalciferol (Vit D3); Drug
Lead sponsor: Children's Hospital of Philadelphia; Other
Eligibility: 5 Years to 24 Years
Enrollment: 44 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Philadelphia, Pennsylvania

Conditions: Glomerular Disease
Interventions: Cholecalciferol, 2000 or 4000 IUs by mouth daily for 12 weeks; Dietary Supplement
Lead sponsor: Children's Hospital of Philadelphia; Other
Eligibility: 5 Years to 30 Years
Enrollment: 32 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2017
U.S. locations: 5
States / cities: Wilmington, Delaware • Baltimore, Maryland • New Hyde Park, New York + 1 more

Conditions: Depression, Depressive Symptoms, Mood
Interventions: vitamin D3, omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D placebo; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 18,353 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2025
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Type 1 Diabetes Mellitus
Interventions: Recombinant human glutamic acid decarboxylase (rhGAD65) formulated in Alhydrogel®, Colecalciferol 2000 IU, Placebo; Biological · Dietary Supplement
Lead sponsor: Diamyd Medical AB; Industry
Eligibility: 12 Years to 28 Years
Enrollment: 321 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2022 – 2026
U.S. locations: 13
States / cities: Newport Beach, California • Palo Alto, California • San Diego, California + 10 more

Conditions: Hypercholesterolemia, Vitamin D Deficiency
Interventions: Vitamin D (1000 or 2000 IU/day), Placebo; Dietary Supplement · Other
Lead sponsor: University of California, San Francisco; Other
Eligibility: 18 Years and older
Enrollment: 130 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2012
U.S. locations: 1
States / cities: San Francisco, California

Conditions: Systemic Lupus Erythematosus
Interventions: Cholecalciferol; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years to 85 Years
Enrollment: 18 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2014
U.S. locations: 1
States / cities: Charleston, South Carolina

Search by objective public record fields.

Establishing the Vitamin D Requirements During Lactation

Vitamin D and Omega-3 Trial (VITAL)

Randomized Controlled Trial of Vitamin D3 in Diabetic Kidney Disease

Evaluating Vitamin D Content in Mushrooms

Vitamin D and Arterial Function in Patients With Chronic Kidney Disease

Vitamin D3 in Systemic Lupus Erythematosus

Supplementation in Adolescent Girls With Endometriosis

Vitamin D and Fish Oil for Autoimmune Disease, Inflammation and Knee Pain

Individualized Response to Vitamin D Treatment Study

DAYLIGHT: Vitamin D Therapy in Individuals at High Risk of Hypertension

Nutraceutical Effects on Long-Term Memory

Vitamin D in HIV-Infected Patients on HAART

Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

VITamin D and OmegA-3 TriaL (VITAL): Fractures, Vitamin D and Genetic Markers

Impact of Vitamin D Supplementation on Cardiac Structure and Function

VITamin D and OmegA-3 TriaL: Effects on Mammographic Density and Breast Tissue

Vitamin D and Severe Asthma Exacerbations

Exercise and NutraStem (NT-020): Effects on Stem Cells

Vitamin D Dose Finding Study

Vitamin D Supplementation in Glomerular Disease

VITAL-DEP: Depression Endpoint Prevention in the VITamin D and OmegA-3 TriaL

A Phase III Study to Investigate if the Study Drug Diamyd Can Preserve Insulin Production and Improve Glycemic Control in Patients Newly Diagnosed With Type 1 Diabetes

Effects of Vitamin D on Lipids

Vitamin D Therapy in Patients With Systemic Lupus Erythematosus (SLE)