Fats & oils
Omega-3s — EPA & DHA
Names you may see: omega 3 fish oil algae algal oil EPA DHA ALA
The quick take
EPA and DHA are omega-3 fats found in fish and certain algae. ALA is a different omega-3 found in plant foods.
A closer look
What forms will I see on a label?
Compare the listed EPA and DHA amounts, not just total fish-oil weight. Algal products provide a non-fish option; their EPA/DHA composition varies.
Why people use it
People choose omega-3 supplements to increase EPA and DHA intake, often with heart-health and general-wellness goals.
These are common goals and marketing uses. The evidence section below explains what research supports.
What does the evidence tell us?
Omega-3s can lower triglycerides, but prescription treatment differs from routine supplementation. Evidence does not show that every fish-oil supplement prevents cardiovascular events.
What should I know before using it?
Discuss use with a pharmacist if you take blood thinners or have a heart-rhythm condition. High doses require professional advice. Check the source for allergies.
Sources & further reading
NIH Office of Dietary Supplements ↗
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.