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ClinicalTrials.gov public records Last synced Oct 2, 2026, 2:09 PM EDT

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Showing 1–24 of 28 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D placebo and fish oil placebo Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study of Vitamin D and Omega-3 Supplementation for Preventing Diabetes

NCT01633177
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Vitamin D3, Omega-3 fatty acid (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
22,220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT05533658
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated May 26, 2023 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

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

NCT01747447
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

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

NCT01351805
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Phase 3 Interventional Results available

Intervention With Vitamin D and Omega-3 Supplements and Incident Heart Failure

NCT02271230
View directory record Official record
Conditions
Heart Failure
Interventions
Vitamin D and fish oil, Fish oil (EPA/DHA) alone, Vitamin D alone, Placebo
Drug · Dietary Supplement · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 18, 2022 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Assessment of DHA On Reducing Early Preterm Birth

NCT02626299
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Mar 30, 2021 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

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

NCT01696435
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Oct 2, 2026, 2:09 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers Results available

Age-related Macular Degeneration (AMD) in the Vitamin D and Omega-3 Trial (VITAL)

NCT01782352
View directory record Official record
Conditions
Age-related Macular Degeneration
Interventions
Omega-3 fatty acids (fish oil), Vitamin D3, Vitamin D3 placebo, Fish oil placebo
Drug · 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 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 8, 2023 · Synced Oct 2, 2026, 2:09 PM EDT
Not listed Not applicable Interventional

Lifestyle Intervention Program for Cognitive Impairment

NCT02741804
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
BBH-1001 Brain Health Supplement, Lifestyle Intervention, Brain Health Placebo
Dietary Supplement · Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
55 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 27, 2016 · Synced Oct 2, 2026, 2:09 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)

NCT01758081
View directory record Official record
Conditions
Infections, Human Cathelicidin Antimicrobial Peptide (hCAP-18)
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
25,874 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 2, 2026, 2:09 PM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Supplementation on Telomeres in VITAL

NCT04386577
View directory record Official record
Conditions
Aging
Interventions
Vitamin D3 (cholecalciferol), fish oil
Dietary Supplement · Drug
Lead sponsor
Augusta University
Other
Eligibility
50 Years and older
Enrollment
1,054 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated May 13, 2020 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Phase 3 Interventional Results available

Effects of Vitamin D and Fish Oil on the Kidney in Hypertensives

NCT02757872
View directory record Official record
Conditions
Hypertension, Kidney Diseases
Interventions
Vitamin D3, Omega-3 Fatty acids, Vitamin D3 placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
50 Years to 99 Years
Enrollment
2,232 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 31, 2024 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional

Diabetes Visual Function Supplement Study

NCT01646047
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 22, 2015 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D Supplementation on Cardiac Structure and Function

NCT01630213
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Oct 2, 2026, 2:09 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

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

NCT01785004
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Apr 13, 2021 · Synced Oct 2, 2026, 2:09 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

LungVITamin D and OmegA-3 Trial (lungVITAL)

NCT01728571
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Terminated Phase 2 Interventional Results available

Vitamin D and n-3 Polyunsaturated Fatty Acids (PUFAs) to Prevent Chronic Pain Following Major Thermal Burn Injury

NCT03313076
View directory record Official record
Conditions
Chronic Pain Following Thermal Burn Injury
Interventions
Omega-3 fatty acids (fish oil), Vitamin D3 (cholecalciferol), Vitamin D3 (cholecalciferol) placebo, Omega-3 fatty acid placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 8, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Omega-3 Supplementation and Mental Health in College Students

NCT07391254
View directory record Official record
Conditions
Mental Health, Vitamin D
Interventions
Placebo, Low dose Omega 3, High dose Omega 3
Dietary Supplement
Lead sponsor
University of Colorado, Colorado Springs
Other
Eligibility
18 Years to 27 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Colorado Springs, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

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

NCT02239874
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Apr 7, 2022 · Synced Oct 2, 2026, 2:09 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Omega-3 Fatty Acids and Subconcussive Head Impacts

NCT06736925
View directory record Official record
Conditions
Subconcussive Head Impact, Omega-3 Fatty Acids
Interventions
Omega-3 Fatty Acids (EPA plus DHA), Organic soybean oil, Soccer Heading Model
Dietary Supplement · Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 30 Years
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Large Randomized Trial of Vitamin D, Omega-3 Fatty Acids and Cognitive Decline

NCT01669915
View directory record Official record
Conditions
Cognitive Decline
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
60 Years to 92 Years
Enrollment
3,424 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 21, 2023 · Synced Oct 2, 2026, 2:09 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Marine Omega-3 Fatty Acids on Anemia

NCT01632761
View directory record Official record
Conditions
Anemia
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
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 21, 2025 · Synced Oct 2, 2026, 2:09 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D and Omega-3 Trial (VITAL)

NCT01169259
View directory record Official record
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 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 2, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT01704859
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Oct 2, 2026, 2:09 PM EDT