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Showing 1–24 of 256 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: fish oil placebo Clear all
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

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

NCT01653678
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D-3 (cholecalciferol), 2000 IU, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years to 99 Years
Enrollment
25,875 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 27, 2026, 5:11 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 9, 2025 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Phase 2 Interventional

Use of Omega-3 Fatty Acids for Perinatal Depression

NCT00402389
View directory record Official record
Conditions
Depression, Depression, Postpartum
Interventions
Omega-3 Fatty Acids (EPA plus DHA), Supportive psychotherapy, Placebo
Drug · Behavioral
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 28, 2013 · Synced Sep 27, 2026, 5:11 PM EDT
Active, not recruiting Not applicable Interventional Results available

Omega Tots Long Term Follow-up

NCT05191823
View directory record Official record
Conditions
Preterm Birth, Child Development
Interventions
Docosahexaenoic Acid + Arachidonic Acid (DHA+AA), Placebo
Drug · Dietary Supplement
Lead sponsor
Sarah Keim
Other
Eligibility
8 Years to 10 Years
Enrollment
377 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 27, 2026, 5:11 PM EDT
Terminated Phase 3 Interventional Results available

Mycophenolate Mofetil (MMF) in Patients With IgA Nephropathy

NCT00318474
View directory record Official record
Conditions
IgA Nephropathy
Interventions
Mycophenolate Mofetil (MMF), MMF Placebo, ACEi, FOS
Drug
Lead sponsor
St. Joseph's Hospital and Medical Center, Phoenix
Other
Eligibility
7 Years to 70 Years
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 6, 2016 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Phase 3 Interventional Results available

DHA (Docosahexaenoic Acid), an Omega 3 Fatty Acid, in Slowing the Progression of Alzheimer's Disease

NCT00440050
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
DHA (Docosahexaenoic Acid), Placebo
Drug
Lead sponsor
Alzheimer's Disease Cooperative Study (ADCS)
Other
Eligibility
50 Years and older
Enrollment
402 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
51
States / cities
Birmingham, Alabama • Phoenix, Arizona • Sun City, Arizona + 41 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2014 · Synced Sep 27, 2026, 5:11 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 29, 2021 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional

Effect of a Component of Fish Oil on Exercise-Induced Bronchoconstriction and Airway Inflammation in Asthma

NCT01200446
View directory record Official record
Conditions
Asthma
Interventions
Docosahexaenoic Acid, Placebo Docosahexaenoic Acid
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 40 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated May 25, 2011 · Synced Sep 27, 2026, 5:11 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 5, 2022 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Evaluating the Effects of Omega-3 Fatty Acids on Heart Disease and Behavior

NCT00663871
View directory record Official record
Conditions
Cardiovascular Diseases, Mood Disorders, Inflammation
Interventions
Fish Oil, Soybean Oil (Placebo)
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
30 Years to 55 Years
Enrollment
272 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Phase 2 Interventional Results available

The Role Of Omega-3 Fatty Acids In Adolescent Depression

NCT00962598
View directory record Official record
Conditions
Depressive Disorder, Major
Interventions
Omega 3 Fatty Acids, Corn oil
Drug · Dietary Supplement
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
12 Years to 19 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2018 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluate the Effects of Repeated Periods of Modified Fasting to Support Healthy Natural Weight Management and Prevention of Weight Gain

NCT03372109
View directory record Official record
Conditions
Body Weight Changes
Interventions
Meal replacement shake, Multivitamin and mineral capsules, Fish oil with sesame lignans and olive extract softgel, Prebiotic Chewable tablet, Clove Extract and Maqui Berry extract capsule, .Whole Food Blend capsule, Turmeric extract capsule, European White Kidney Bean capsule, Saffron extract capsule, Ubiquinol with Fulvic acid complex softgel, Calcium with Hesperidin and gynostemma extract tablet, Multivitamin and mineral supplement
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Apr 16, 2018 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Neurochemical Effects of Omega-3 Fatty Acids in Adolescents at Risk for Mania

NCT00917501
View directory record Official record
Conditions
Mania
Interventions
OMega 3, Placebo
Drug
Lead sponsor
University of Cincinnati
Other
Eligibility
10 Years to 21 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 12, 2019 · Synced Sep 27, 2026, 5:11 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 12, 2020 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional Results available

Omega-3 Fatty Acids and Post Traumatic Stress Disorder (PTSD)

NCT00644423
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
Omega-3 Fatty Acid, Placebo
Drug
Lead sponsor
Durham VA Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 19, 2019 · Synced Sep 27, 2026, 5:11 PM EDT
Withdrawn Phase 1Phase 2 Interventional

Investigational Study of Oral Fish Oil in Treating Parenteral Nutrition Associated Liver Disease

NCT01191177
View directory record Official record
Conditions
Liver Disease, Short Bowel Syndrome
Interventions
Lovaza (omega-3-acid ethyl ester), Corn oil
Drug · Dietary Supplement
Lead sponsor
Boston Children's Hospital
Other
Eligibility
30 Days to 21 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 21, 2017 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional Results available

Omega 3 Fatty Acids in the Treatment of Children With Autism Spectrum Disorders

NCT00467818
View directory record Official record
Conditions
Autism
Interventions
Omega 3 fatty acids, Placebo
Drug · Other
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
5 Years to 17 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 25, 2021 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Phase 3 Interventional Results available

Omega-3 Fatty Acids to Improve Depression and Reduce Cardiovascular Risk Factors

NCT00116857
View directory record Official record
Conditions
Cardiovascular Diseases, Depression, Heart Diseases, Myocardial Infarction, Angina, Unstable
Interventions
Sertraline/omega-3, Sertraline/Corn Oil
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 11, 2012 · Synced Sep 27, 2026, 5:11 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Therapeutic Omegas for Triglyceride Suppression

NCT04349475
View directory record Official record
Conditions
Pregnancy
Interventions
Intervention Omega 3 Supplementation, Placebo Soybean Oil
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
0 Years to 39 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
2
States / cities
Aurora, Colorado • Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional

Nutritional Intervention to Prevent Diabetes

NCT00333554
View directory record Official record
Conditions
Type 1 Diabetes Mellitus
Interventions
DHA Treatment, Placebo for DHA
Dietary Supplement
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Up to 5 Months
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
9
States / cities
Los Angeles, California • Orange, California • San Francisco, California + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 28, 2020 · Synced Sep 27, 2026, 5:11 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Feasibility Pilot Clinical Trial of Omega-3 Supplement vs. Placebo for Post Covid-19 Recovery Among Health Care Workers

NCT05121766
View directory record Official record
Conditions
COVID-19
Interventions
Omega-3 (EPA+DHA), Placebo
Drug
Lead sponsor
Hackensack Meridian Health
Other
Eligibility
18 Years to 89 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Edison, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 27, 2026, 5:11 PM EDT
Terminated Not applicable Interventional

n-3 Polyunsaturated Fatty Acids to Prevent and Treat Diabetic Neuropathy

NCT05145452
View directory record Official record
Conditions
Diabetic Neuropathies
Interventions
Fish-oil derived n-3 polyunsaturated fatty acids
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
55 Years to 80 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
2
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Early Phase 1 Interventional

Docosahexaenoic Acid (DHA) To Prevent Development of Cognitive Dysfunction Due to Chemotherapy

NCT02517502
View directory record Official record
Conditions
Cognitive Dysfunction
Interventions
DHA, Placebo
Drug
Lead sponsor
Carol Fabian, MD
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
Decatur, Illinois • Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2022 · Synced Sep 27, 2026, 5:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Omega-3 Fatty Acid Supplementation to Enhance Performance

NCT05924139
View directory record Official record
Conditions
Strength, Body Composition, Muscle Soreness
Interventions
Omega-3 fatty acid, Placebo
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 25 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated Jun 28, 2023 · Synced Sep 27, 2026, 5:11 PM EDT