Omega-3D: Omega-3 for Diet-Driven Health Disparities

NCT ID: NCT07078344

Last Updated: 2025-12-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-07-31

Study Completion Date

2029-12-31

Brief Summary

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The goal of this clinical trial is to learn whether omega-3 fatty acid supplementation can reduce inflammation-related biomarkers and improve cardiovascular health in healthy adult volunteers with different genetic backgrounds. The main questions it aims to answer are: Does the response to omega-3 supplementation differ based on genetic variation in the FADS gene cluster (specifically rs174537)? Are changes in fatty acid ratios and inflammation markers greater among individuals of African ancestry compared to those of European ancestry? Researchers will compare omega-3 supplements to a placebo in a randomized, placebo-controlled crossover study to determine whether the Omega-3 supplementation is more effective in certain genetic and ancestry groups. Participants will take omega-3 supplements or a placebo daily for a defined period, then cross over to the other intervention. They will provide blood samples for analysis of fatty acid levels and inflammatory markers, complete questionnaires, and attend scheduled study visits.

Detailed Description

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Conditions

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Heart Health Markers Cardiovascular Diseases Omega 3 Fatty Acids

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors
Identical capsules and packaging for omega-3 and safflower oil placebo; blinded allocation and crossover order.

Study Groups

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Blinded Crossover Arm: Omega-3 Fatty Acids and Safflower Oil Placebo

Participants receive both study interventions (omega-3 fatty acid supplement and safflower oil placebo) across two blinded treatment periods in a randomized crossover design. The randomization schedule determines which supplement is administered first, but participants and investigators remain blinded to the identity and order of study supplements.

Group Type EXPERIMENTAL

Omega-3 Fatty Acids and Safflower Oil Placebo

Intervention Type DIETARY_SUPPLEMENT

Blinded study supplement; appearance-matched softgels.

Safflower Oil Placebo and Omega-3 Fatty Acids

Intervention Type DIETARY_SUPPLEMENT

Blinded study supplement; appearance-matched softgels.

Blinded Crossover Arm: Safflower Oil Placebo and Omega-3 Fatty Acids

Participants receive both study interventions (safflower oil placebo and omega-3 fatty acid supplement) across two blinded treatment periods in a randomized crossover design. The sequence is the opposite of Arm 1, but study blinding prevents participants and investigators from knowing which supplement is administered during each period.

Group Type EXPERIMENTAL

Omega-3 Fatty Acids and Safflower Oil Placebo

Intervention Type DIETARY_SUPPLEMENT

Blinded study supplement; appearance-matched softgels.

Safflower Oil Placebo and Omega-3 Fatty Acids

Intervention Type DIETARY_SUPPLEMENT

Blinded study supplement; appearance-matched softgels.

Interventions

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Omega-3 Fatty Acids and Safflower Oil Placebo

Blinded study supplement; appearance-matched softgels.

Intervention Type DIETARY_SUPPLEMENT

Safflower Oil Placebo and Omega-3 Fatty Acids

Blinded study supplement; appearance-matched softgels.

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* Age ≥ 18 years
* BMI ≥ 18.5 kg/m2
* Self-identify as non-Hispanic African American or non-Hispanic European American
* Ability and willingness to transport for regular clinic visits.
* Ability and willingness to swallow study capsules.
* Willingness to refrain from intentional weight loss
* Willingness maintain usual physical activity levels and dietary intake throughout the trial.

Exclusion Criteria

* Age \> 65 years
* BMI ≥ 40 kg/m2
* Currently pregnant or breastfeeding.
* Currently receiving treatment for cancer (excluding adjuvant therapies).
* Consumption of DHA/EPA-rich fish 2 or more days a week (defined as \>0.5 g DHA or EPA/serving)
* Has a history of atrial fibrillation.
* Has been diagnosed with a significant psychiatric condition that might compromise adherence to study protocols, including eating disorders, schizophrenia, bipolar (manic phase), severe personality disorders, severe major depressive, severe anxiety disorders, and substance use disorders.
* Have an allergy to the study oils.
* Have received other investigational agents within the past 6 months.
* Currently on a weight reducing diet or has lost \>5% body weight in the past 6 months.
* Currently using GLP-1
* Currently using prescribed anticoagulants or have a blood clotting problem or disease that causes excessive bleeding or been told by a physician that you have an increased risk of serious bleeding
* Currently using oral steroids
* Perceivably unable or unwilling to use acetaminophen in place of aspirin (including low dose regimen), NSAIDS, or other COX-2 inhibitors.
* Perceivably unable or unwilling to refrain from using anti- inflammatory supplements (including n-3 supplements).
* Perceivably unable or unwilling to refrain from using montelukast-type of allergy medications.
* Run-in failure
Minimum Eligible Age

18 Years

Maximum Eligible Age

64 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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National Center for Complementary and Integrative Health (NCCIH)

NIH

Sponsor Role collaborator

Georgetown University

OTHER

Sponsor Role collaborator

University of Arizona

OTHER

Sponsor Role lead

Responsible Party

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Patricia Thompson

Professor of Physiology

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Arizona Cancer Center

Tucson, Arizona, United States

Site Status RECRUITING

Georgetown University

Washington D.C., District of Columbia, United States

Site Status NOT_YET_RECRUITING

Countries

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United States

Central Contacts

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Susana Chavez

Role: CONTACT

(520) 626-2548

Susan Schembre, PhD

Role: CONTACT

2026870802

Facility Contacts

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Patricia A Thompson, PhD

Role: primary

520-626-3138

Other Identifiers

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2R01AT008621-07

Identifier Type: NIH

Identifier Source: secondary_id

View Link

STUDY00005456

Identifier Type: -

Identifier Source: org_study_id