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ClinicalTrials.gov public records Last synced Nov 7, 2026, 11:59 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 66 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D Oil Clear all

Conditions: Cystic Fibrosis
Interventions: Vitamin D Powder, Vitamin D Oil; Dietary Supplement
Lead sponsor: Emory University; Other
Eligibility: 18 Years to 59 Years
Enrollment: 17 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2015
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Bone Density, Bone Health, 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: Healthy volunteers not accepted
Timeline: 2019 – 2026
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Preterm Birth
Interventions: Docosahexaenoic acid - 800mg/day, Docosahexaenoic acid - 200mg/day, Placebo; Drug · Other
Lead sponsor: University of Kansas Medical Center; Other
Eligibility: 18 Years and older · Female only
Enrollment: 1,100 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2020
U.S. locations: 3
States / cities: Kansas City, Kansas • Cincinnati, Ohio • Columbus, Ohio

Conditions: Preeclampsia
Interventions: Dietary Supplement/Vitamins, Placebo for Vitamin C and Vitamin E; Drug
Lead sponsor: The George Washington University Biostatistics Center; Other
Eligibility: Female only
Enrollment: 10,154 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2003 – 2009
U.S. locations: 16
States / cities: Birmingham, Alabama • Chicago, Illinois • Detroit, Michigan + 13 more

Conditions: Bone Density, Body Composition, Bone Health
Interventions: Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3; Dietary Supplement
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 771 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2023
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Vitamin A Status
Interventions: b-carotene, retinyl palmitate, placebo; Dietary Supplement
Lead sponsor: University of California, Davis; Other
Eligibility: 18 Years to 35 Years · Female only
Enrollment: 85 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2013
U.S. locations: 1
States / cities: Davis, California

Conditions: Breastfeeding, Postpartum Sexual Dysfunction, Vaginal Atrophy
Interventions: Estradiol, Vaginal Moisturizer; Drug · Device
Lead sponsor: University Hospitals Cleveland Medical Center; Other
Eligibility: 18 Years to 50 Years · Female only
Enrollment: 100 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2026
U.S. locations: 1
States / cities: Cleveland, Ohio

Conditions: COPD, Asthma, Pulmonary Function, Pneumonia
Interventions: Vitamin D3, fish oil, Vitamin D3 placebo, Fish oil placebo; Dietary Supplement
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010 – 2027
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Dry Eye, Dry Eye Syndromes
Interventions: Blink NutriTears, Placebo; Dietary Supplement
Lead sponsor: Applied Science & Performance Institute; Industry
Eligibility: 18 Years to 65 Years
Enrollment: 131 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2022 – 2023
U.S. locations: 3
States / cities: Lutz, Florida • Tampa, Florida

Conditions: Plaque-type Psoriasis
Interventions: CD 2027; Drug
Lead sponsor: Galderma R&D; Industry
Eligibility: 18 Years and older
Enrollment: 26 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2009
U.S. locations: 3
States / cities: Hot Springs, Arizona • Austin, Texas • Bryan, Texas

Conditions: Diabetes Mellitus - Type 1, Diabetes Mellitus - Type 2, Non-proliferative Diabetic Retinopathy
Interventions: multi-component nutritional supplement capsules, multi-component dietary supplement; Dietary Supplement
Lead sponsor: ZeaVision, LLC; Industry
Eligibility: 18 Years and older
Enrollment: 70 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2012 – 2014
U.S. locations: 1
States / cities: Tacoma, Washington

Conditions: Eye Health, Vision, Cognitive Function
Interventions: VisionPure Dietary Supplement, Placebo; Dietary Supplement
Lead sponsor: Applied Science & Performance Institute; Industry
Eligibility: 18 Years to 40 Years
Enrollment: 15 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2022 – 2023
U.S. locations: 3
States / cities: Lutz, Florida • Tampa, Florida

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: Adiposity
Interventions: Vitamin D3 (cholecalciferol), 2000 IU per day, omega-3 fatty acids (fish oil); Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 600 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2022
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Protein
Interventions: Conjugated linoleic acid, Vitamin D, Conjugated linoleic acid and Vitamin D, Corn oil (placebo); Dietary Supplement · Other
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 65 Years to 85 Years
Enrollment: 40 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2017 – 2019
U.S. locations: 1
States / cities: St Louis, Missouri

Conditions: Warts
Interventions: Vitamin D3, Placebo; Drug
Lead sponsor: Stephen P. Merry; Other
Eligibility: 18 Years and older
Enrollment: 77 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2023
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Center-involved Diabetic Macular Edema (CI-DME)
Interventions: Diabetes Visual Function Study (DiVFuSS) softgels, canola oil placebo softgels, 2 per day; Dietary Supplement · Other
Lead sponsor: ZeaVision, LLC; Industry
Eligibility: 18 Years to 80 Years
Enrollment: 150 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2021
U.S. locations: 2
States / cities: Olympia, Washington • Tacoma, Washington

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: Family Member
Interventions: Bio-D-Mulsion Forte®, Placebo; Dietary Supplement · Other
Lead sponsor: University of Miami; Other
Eligibility: 55 Years and older
Enrollment: 101 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2014 – 2015
U.S. locations: 1
States / cities: Miami, Florida

Conditions: Cancer of Pancreas
Interventions: Nutrawell Powder, Diet Only, OmegaRich fish oil supplement; Dietary Supplement · Other
Lead sponsor: Jonsson Comprehensive Cancer Center; Other
Eligibility: 18 Years to 75 Years · Male only
Enrollment: 2 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2021
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Ulcerative Colitis
Interventions: Nutrition supplement, Placebo supplement; Dietary Supplement
Lead sponsor: Baptist Memorial Health Care Corporation; Other
Eligibility: 18 Years and older
Enrollment: 30 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018
U.S. locations: 1
States / cities: Memphis, Tennessee

Conditions: Cardiovascular Disease
Interventions: Vitamin D3, Omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D3 placebo; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,119 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2012 – 2026
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Critically Ill, Acute Kidney Injury
Interventions: Calcifediol, Calcitriol, Placebos; Drug
Lead sponsor: David Leaf; Other
Eligibility: 18 Years and older
Enrollment: 150 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2020
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

Search by objective public record fields.

Comparison of Absorption of Vitamin D in Cystic Fibrosis

VITamin D and OmegA-3 TriaL: Interrelationship of Vitamin D and Vitamin K on Bone (VITAL)

Assessment of DHA On Reducing Early Preterm Birth

Combined Antioxidant and Preeclampsia Prediction Studies (CAPPS)

VITamin D and OmegA-3 TriaL: Effects on Bone Structure and Architecture (VITAL)

Effect of Small Daily Doses of B-carotene on Breast Milk Retinol

Postpartum Vaginal Estrogen for Breastfeeding Patients

LungVITamin D and OmegA-3 Trial (lungVITAL)

Efficacy and Safety Safety of Nutritears® in Adults With Dry Eye Syndrome

Pharmacokinetic (PK) and Pharmacodynamic (PD) Study of CD 2027 Spray in Adults With Plaque-type Psoriasis

Diabetes Visual Function Supplement Study

The Effects of VisionPure™ on Indices of Vision Health and Cognitive Function

Impact of Vitamin D Supplementation on Cardiac Structure and Function

Vitamin D and Omega-3 Adiposity Trial (VITAL Adiposity)

CLA and Vitamin D on Protein Turnover

Intralesional Vitamin D Injection for Treatment of Common Warts

Prospective Study of Adjunctive Carotenoids Plus Anti-oxidants in Anti-VEGF Treated Diabetic Macular Edema

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

Vitamin D's Effect on Physical Performance in the Elderly

Nutrition Support to Improve Outcomes in Patients With Unresectable Pancreatic Cancer

Immunonutrition in Ulcerative Colitis

VITAL Rhythm Study

Activated Vitamin D for the Prevention and Treatment of Acute Kidney Injury

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