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Omega-3 Fatty Acids (EPA/DHA)

Essential fatty acids that research suggests may support cardiovascular health, brain function, and reduce inflammation throughout the body.

Human Trials

85

156,000 participants

Risk Level

Low Risk

Monthly Cost

$15$60 /month

Varies by EPA/DHA concentration and quality

Quick Facts

Category
Supplement
Research Field
Supplements
Evidence Grade
B+ – Good
Risk Level
Low
Monthly Cost
$15 – $60
Human Trials
85

Typical Dose

1–2 g combined EPA+DHA per day

Range

0.5–4 g EPA+DHA/day

Timingwith a meal containing fat for best absorption
Formfish oil or algae oil softgel (triglyceride form preferred over ethyl ester)
NotesAlgae oil is equivalent to fish oil and vegan-friendly. Aim for EPA:DHA ratio ~2:1 for anti-inflammatory effect. Refrigerate to prevent oxidation.

For informational purposes only – not medical advice. See disclaimer

Research Velocity

+6%
2847 publications in the last 12 months · steady increase in publications
High Community Interest
230 mentions
Sources:LongecityReddit
Updated 2026-03-16

Mechanism of Action

EPA and DHA are incorporated into cell membranes where they influence membrane fluidity and cellular signaling. Studies indicate they modulate inflammatory pathways by reducing pro-inflammatory cytokines and increasing specialized pro-resolving mediators. Research suggests they may also support neurotransmitter function and cardiovascular health through effects on blood pressure, triglycerides, and endothelial function.

Overview

Omega-3 fatty acids EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are essential polyunsaturated fats primarily found in marine sources. Research indicates these compounds play crucial roles in cardiovascular health, with studies suggesting they may help reduce triglyceride levels, support healthy blood pressure, and decrease inflammation markers. Large-scale trials like the VITAL study have shown mixed but generally positive results for cardiovascular protection, particularly in populations with lower baseline omega-3 intake.

Studies suggest omega-3s may also support brain health and cognitive function throughout the lifespan. Research indicates DHA is particularly concentrated in brain tissue and may help maintain neuronal membrane integrity and support neurotransmitter function. Some trials have shown potential benefits for mood regulation and cognitive decline in aging populations, though results vary based on dosage, duration, and participant characteristics.

The research profile for omega-3 supplementation is extensive, with decades of human trials examining various health outcomes. While not all studies show uniform benefits, the overall evidence suggests omega-3 supplementation may be particularly beneficial for individuals with low dietary fish intake, elevated triglycerides, or inflammatory conditions. Quality and bioavailability can vary significantly between products, with factors like EPA/DHA ratio, molecular form, and purity affecting research outcomes.

Known Interactions

  • May increase bleeding risk when combined with anticoagulant medications like warfarin
  • Can enhance the effects of blood pressure medications
  • May interact with immunosuppressive drugs by modulating immune function
  • High doses may affect blood sugar control in diabetic patients

Legal Status by Country

📍

Your country (United States)

OTC
✈️

Available without prescription in:

Australia, Brazil, Canada, China, Colombia, Germany, India, Israel, Japan, Mexico, Netherlands, Panama, Russia, South Korea, Switzerland, Thailand, Turkey, UAE, United Kingdom, United States

Australia
OTC
✈️Brazil
OTC
Canada
OTC
China
OTC
✈️Colombia
OTC
Germany
OTC
✈️India
OTC
✈️Israel
OTC
Japan
OTC
✈️Mexico
OTC
Netherlands
OTC
✈️Panama
OTC
Russia
OTC
✈️South Korea
OTC
Switzerland
OTC
✈️Thailand
OTC
✈️Turkey
OTC
✈️UAE
OTC
United Kingdom
OTC
📍United States
OTC

📍 = your selected country · ✈️ = medical tourism destination · Always verify current local regulations before travel.

Where to Buy

Everspan may earn a commission on purchases. This doesn't affect our evidence-based ratings.

MomentousPremium

Momentous Omega-3 Fish Oil

$40/moBuy →
ThorneEditor's pick

Thorne Super EPA Pro

$32/moBuy →
iHerbBudget

NOW Foods Ultra Omega-3

$16/moBuy →

Last verified: 2026-03-16