Algae Oil (Vegan DHA/EPA)

Commonly used for
Heart HealthNutritionInflammation
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What is it? / Overview
Microalgae synthesize preformed EPA and DHA directly, bypassing the inefficient ALA-to-EPA-to-DHA conversion pathway that plant sources like flaxseed rely on. These long-chain omega-3s incorporate into cell membranes, lower triglycerides, and generate anti-inflammatory mediators -- a scoping review found microalgal oil reliably raised the omega-3 index in every study, unlike flax or echium oil.
How is it used? / Administration
Form: Microalgal (Schizochytrium/Crypthecodinium) oil providing preformed DHA, sometimes with added EPA -- the only plant-derived source shown to reliably raise the omega-3 index, making it the preferred vegan/vegetarian alternative to fish oil
Typical dose studied: ~200-500 mg DHA (plus/minus EPA)/day for general use; 1-2+ g EPA/DHA for triglyceride-lowering, mirroring fish-oil dosing
Timing: With a fat-containing meal to aid absorption
Cross-links to the existing Omega-3 (Fish Oil) entry (see that separate entry) -- same active compounds (EPA/DHA), different source; this is the entry to recommend for anyone on a vegetarian or vegan diet pattern instead of fish oil.
How well does it work? / Evidence
~ Moderate evidence
Who should avoid it?
Avoid with: Bleeding disorder / Coagulopathy
Interacts with: Anticoagulants, antiplatelets -- theoretical additive bleeding risk at high doses, same as fish oil
Already taking it? Reasonable to continue -- the best-supported vegan/vegetarian omega-3 source, since it supplies preformed EPA/DHA directly rather than relying on the body's inefficient conversion from plant ALA.
Research & references
Lane KE et al. (2021). Bioavailability and Conversion of Plant Based Sources of Omega-3 Fatty Acids - A Scoping Review to Update Supplementation Options for Vegetarians and Vegans. Critical Reviews in Food Science and Nutrition. Vergara Nieto ÁA et al. (2025). Molecular Features, Effective Sources, and Physiological Effects of Omega-3 Unsaturated Fatty Acids. Nutrition Reviews.
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