Strong evidenceHeart & metabolic

Algae Omega-3 (Vegan DHA/EPA)

Algal oil is a genuine plant-based source of preformed DHA (and increasingly EPA) that raises blood omega-3 levels as effectively as fish. It is the correct choice for vegans and vegetarians, since converting ALA from flax or chia to DHA is inefficient.

What the science says

Raises DHA status equivalently to eating fish Strong evidence
A randomized crossover trial found that algal-oil capsules delivering ~600 mg DHA/day and two servings per week of cooked salmon produced comparable increases in plasma and erythrocyte DHA over two weeks. Algal DHA is chemically identical to fish-derived DHA — fish get it from algae in the first place.
Lowers triglycerides Strong evidence
A meta-analysis of 11 randomized trials in people without coronary heart disease found algal DHA (typically 1-2 g/day) reduced serum triglycerides by about 15 mg/dL and raised HDL-cholesterol by about 4 mg/dL versus placebo. LDL-cholesterol also rose by roughly 8 mg/dL, a known effect of high-dose DHA that should be weighed in people with elevated LDL.
Better than flax or chia for vegans Strong evidence
Conversion of plant ALA to DHA in humans is typically under 1%, so ALA-only sources do not reliably raise DHA status. Algal oil bypasses the conversion step entirely, making it the only vegan supplement that meaningfully increases the omega-3 index.

Dosage & safety

Studied dose250-500 mg/day combined EPA+DHA covers general adequacy for someone not eating fish. Triglyceride-lowering trials used 1,000-2,000 mg/day DHA. Pregnancy and lactation guidance is typically at least 200-300 mg/day DHA.

SafetyVery well tolerated with no fishy taste and no heavy-metal or ocean-contaminant concern. Mild GI upset and belching occur at higher doses. High-dose DHA can raise LDL-cholesterol modestly. Mild antiplatelet effect at gram-level doses — use caution with anticoagulants and disclose before surgery. Safe in pregnancy at typical doses; algal DHA is in fact the standard omega-3 source in vegan prenatal formulas.

Scientific references

Algal-oil capsules and cooked salmon: nutritionally equivalent sources of docosahexaenoic acid
Arterburn LM, et al. — Journal of the American Dietetic Association, 2008
A meta-analysis shows that docosahexaenoic acid from algal oil reduces serum triglycerides and increases HDL-cholesterol and LDL-cholesterol in persons without coronary heart disease
Bernstein AM, et al. — The Journal of Nutrition, 2012

Where to buy

Flora, Omega-3, Vegan Algae EPA & DHA, 60 Vegetarian Softgels

View on iHerb

Referral link — this site may earn a commission on purchases.

Related in Heart & metabolic

Vitamin B3 (Niacin) Limited evidence
Vitamin K2 (MK-7) Limited evidence
Chromium Limited evidence
Potassium Strong evidence
Vanadium Limited evidence
L-Arginine Moderate evidence