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ClinicalTrials.gov public records Last synced Nov 15, 2026, 6:45 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 1–22 of 22 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: 5000 IU D3 Clear all

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: Female Hormone Profile
Interventions: Vitamin D (Cholecalciferol ), Placebo Group; Dietary Supplement
Lead sponsor: University of Southern California; Other
Eligibility: 18 Years to 35 Years · Female only
Enrollment: 20 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2025 – 2026
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Crohns Disease, Vitamin D Deficiency
Interventions: 5000 IU D3, 1000 IU D3, Placebo; Dietary Supplement
Lead sponsor: Cedars-Sinai Medical Center; Other
Eligibility: 18 Years and older
Enrollment: 10 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018
U.S. locations: 1
States / cities: Los Angeles, California

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: Vitamin D Deficiency, Rickets, Infant Nutrition Disorders
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Mayo Clinic; Other
Eligibility: 1 Month to 50 Years
Enrollment: 80 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2011
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Gingivitis
Interventions: vitamin D3, Placebo; Drug · Other
Lead sponsor: Boston University; Other
Eligibility: 18 Years to 64 Years
Enrollment: 35 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2008 – 2011
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Multiple Sclerosis, Relapsing-remitting
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Johns Hopkins University; Other
Eligibility: 18 Years to 60 Years · Female only
Enrollment: 57 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2014
U.S. locations: 2
States / cities: San Francisco, California • Baltimore, Maryland

Conditions: Relapsing Remitting Multiple Sclerosis
Interventions: Vitamin D3; Drug
Lead sponsor: Johns Hopkins University; Other
Eligibility: 18 Years to 50 Years
Enrollment: 172 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2021
U.S. locations: 16
States / cities: Carmichael, California • San Francisco, California • Stanford, California + 12 more

Conditions: Gastric Bypass, Parathyroid Hormone
Interventions: Paricalcitol, Cholecalciferol, Placebo; Drug
Lead sponsor: Kerstyn C. Zalesin, M.D.; Other
Eligibility: 18 Years to 100 Years
Enrollment: 49 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2015
U.S. locations: 1
States / cities: Royal Oak, Michigan

Conditions: Atherosclerosis, Systemic Lupus Erythematosus
Interventions: Cholecalciferol; Drug
Lead sponsor: Medical University of South Carolina; Other
Eligibility: 18 Years to 80 Years
Enrollment: 9 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 1
States / cities: Charleston, South Carolina

Conditions: Respiratory Tract Infections, Covid19, Flu Like Illness
Interventions: Vitamin D supplementation; Dietary Supplement
Lead sponsor: Cooper Norcross Health; Other
Eligibility: 18 Years and older
Enrollment: 877 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2020 – 2023
U.S. locations: 1
States / cities: Camden, New Jersey

Conditions: Vitamin D Deficiency Disease
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Madigan Army Medical Center; Federal
Eligibility: 18 Years and older
Enrollment: 131 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2018
U.S. locations: 1
States / cities: Tacoma, Washington

Conditions: Hypertension, Vitamin D Deficiency
Interventions: Cholecalciferol; Drug
Lead sponsor: Loyola University; Other
Eligibility: 25 Years to 45 Years
Enrollment: 5 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018
U.S. locations: 1
States / cities: Maywood, Illinois

Conditions: Prostate Cancer
Interventions: Vitamin D, Omega-3, Turmeric; Dietary Supplement
Lead sponsor: Case Comprehensive Cancer Center; Other
Eligibility: Male only
Enrollment: 37 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2019
U.S. locations: 1
States / cities: Cleveland, Ohio

Conditions: Vitamin D Deficiency
Interventions: High dose Vitamin D3, Low dose Vitamin D3; Dietary Supplement
Lead sponsor: Texas Tech University Health Sciences Center; Other
Eligibility: 65 Years to 89 Years
Enrollment: 14 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2019
U.S. locations: 1
States / cities: Lubbock, Texas

Conditions: Immune Response
Interventions: Vit.D3 5000 IU, Immune Active; Dietary Supplement
Lead sponsor: Metagenics, Inc.; Industry
Eligibility: 18 Years to 69 Years
Enrollment: 7 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2021 – 2022
U.S. locations: 1
States / cities: Gig Harbor, Washington

Conditions: Autistic Disorder
Interventions: Vitamin D3; Drug
Lead sponsor: Oregon Health and Science University; Other
Eligibility: 20 Years to 44 Years · Female only
Enrollment: 20 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2016
U.S. locations: 1
States / cities: Oregon City, Oregon

Conditions: Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
Interventions: Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol); Drug
Lead sponsor: Heidi Moretti, MS, RD; Other
Eligibility: Not listed
Enrollment: 40 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2015
U.S. locations: 2
States / cities: Missoula, Montana

Conditions: Vitamin D Deficiency, Breast Milk Collection
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: Mayo Clinic; Other
Eligibility: 1 Month to 60 Years
Enrollment: 101 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2023 – 2026
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Covid 19, Vitamin D Deficiency
Interventions: Vitamin D3; Dietary Supplement
Lead sponsor: Arizona State University; Other
Eligibility: 18 Years and older
Enrollment: 41 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020
U.S. locations: 1
States / cities: Tempe, Arizona

Conditions: Obesity, Insulin Resistance, Vitamin D Deficiency
Interventions: Vitamin D3; Drug
Lead sponsor: Perrin C White, MD; Other
Eligibility: 6 Years to 17 Years
Enrollment: 109 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2015
U.S. locations: 1
States / cities: Dallas, Texas

Conditions: Prediabetes, Vitamin D Deficiency
Interventions: Cholecalciferol (vitamin D3); Dietary Supplement
Lead sponsor: University of Minnesota; Other
Eligibility: 18 Years to 65 Years
Enrollment: 12 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2008
U.S. locations: 1
States / cities: Minneapolis, Minnesota

Search by objective public record fields.

Vitamin D3 Supplementation Pilot Study

Acute Vitamin D Supplementation on Testosterone in Females

Maintenance Dosing of Vitamin D in Crohn's Disease

Vitamin D Dose Finding Study

Vitamin D Supplementation in Breastfeeding Women

Dose-dependent Anti-inflammatory Effects of Vitamin D in a Human Gingivitis Model

Pharmacokinetics of Vitamin D in Multiple Sclerosis and in Health

Vitamin D Supplementation in Multiple Sclerosis

Trial Of Paricalcitol and Cholecalciferol(Vitamin D3) in the Treatment Of Secondary Hyperparathyroidism in Patients After ROUX-EN-Y Gastric Bypass Surgery

Vitamin D to Improve Endothelial Function in SLE

Vitamin D3 Supplementation to Prevent Respiratory Tract Infections

Vitamin D Supplementation in Warfighters

Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study

Correlative Analysis of the Genomics of Vitamin D and Omega-3 Fatty Acid Intake in Prostate Cancer

Improving Functionality in Older People

LIFEHOUSE: Description of the Tent Bucket -Immune Support

Vitamin D to Prevent Autism in Newborn Siblings

Vitamin D3 Supplementation for Heart Failure Patients

Vitamin D Sulfates in Breastmilk

Vitamin D Testing and Treatment for COVID 19

Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth

Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism