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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.

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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.

How to take it

TimingTiming does not matter.
With food?With a meal containing fat, which meaningfully improves absorption of the triglyceride and ethyl ester forms.
Worth knowingCheck the EPA:DHA split — many algal products are DHA-heavy, and high-dose DHA alone can nudge LDL cholesterol up.

Interactions

With medications

  • warfarin, DOACs and antiplatelet drugs

    Mild antiplatelet effect at gram-level doses adds to anticoagulation. tell your prescriber and disclose it before surgery

With other supplements

  • fish oil, krill oil and cod liver oil

    The same EPA and DHA from a different source, so the doses and the antiplatelet effect add. use one source and count total EPA+DHA

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Is algae oil as good as fish oil for omega-3?

Yes, with strong evidence: algal oil capsules delivering about 600 mg DHA/day raised blood DHA as much as two servings of salmon per week in a crossover trial. Algal DHA is chemically identical to fish DHA, since fish get it from algae.

What is the best omega-3 supplement for vegans?

Algae omega-3 is the best vegan choice, because conversion of plant ALA from flax or chia to DHA is typically under 1%. Algal oil supplies preformed DHA (and often EPA), making it the only vegan supplement that meaningfully raises the omega-3 index.

How much algae omega-3 should I take per day?

For someone who does not eat fish, 250-500 mg/day of combined EPA+DHA from algae oil covers general adequacy. Triglyceride-lowering trials used 1,000-2,000 mg/day DHA, and pregnancy guidance is typically at least 200-300 mg/day DHA.

Does algae omega-3 raise LDL cholesterol?

At high doses it can: a meta-analysis found algal DHA at typically 1-2 g/day lowered triglycerides by about 15 mg/dL but raised LDL by roughly 8 mg/dL. If your LDL is elevated, check the EPA:DHA split, since many algae products are DHA-heavy.

Scientific references

Where to buy

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

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