What is algae omega-3?
Algae omega-3 is a plant-based supplement containing the long-chain omega-3 fatty acids DHA (docosahexaenoic acid) and in some cases also EPA (eicosapentaenoic acid). Algae omega-3 is derived from microalgae — tiny single-celled organisms cultivated under controlled conditions.
An interesting fact: fish do not actually produce EPA and DHA themselves. They obtain these fatty acids through their diet — from microalgae and the omega-3 fatty acids they contain. Algae oil is therefore the "original source" of omega-3 (Lane & Derbyshire, 2014), not an intermediary.
The main microalgae species used for algae oil production:
- Schizochytrium sp. — produces both DHA and EPA
- Crypthecodinium cohnii — primarily produces DHA
- Nannochloropsis sp. — species with high EPA content
How does algae omega-3 work?
Algae omega-3 contains the same EPA and DHA fatty acids as fish oil. These are long-chain polyunsaturated fatty acids essential for the normal functioning of the body.
DHA is a structural component of brain tissue, the retina and sperm. EPA participates in the synthesis of eicosanoids (hormone-like signalling molecules).
The body's conversion pathway is as follows: from plant-based ALA (alpha-linolenic acid, found in flaxseeds and chia seeds), the body can theoretically synthesise EPA and DHA, but this conversion is very inefficient — an estimated 0.5–5% of ALA is converted to DHA (Brenna, 2002). Direct consumption of DHA and EPA is therefore far more effective.
Evidence and benefits
The same EFSA-approved claims apply to algae omega-3 as to any EPA/DHA source, since the active compounds are identical:
- EPA and DHA contribute to the normal function of the heart — 250 mg EPA and DHA per day
- DHA contributes to the maintenance of normal brain function — 250 mg DHA per day
- DHA contributes to the maintenance of normal vision — 250 mg DHA per day
- DHA contributes to the normal brain development of the foetus and breastfed infants — 200 mg DHA per day in addition to the recommended EPA+DHA intake
- DHA contributes to the normal visual development of the foetus and breastfed infants — 200 mg DHA per day
- EPA and DHA contribute to the maintenance of normal blood pressure — 3 g per day
- EPA and DHA contribute to the maintenance of normal blood triglyceride levels — 2 g per day
These claims apply regardless of whether EPA and DHA come from fish, krill or algae.
How to take algae omega-3
Algae omega-3 is available as soft capsules (often in vegan capsules), liquid oil and powder.
Practical recommendations:
- Choose a DHA+EPA combination — some older algae oils contain only DHA. Newer products also offer EPA
- Check DHA/EPA amounts — aim for at least 250 mg DHA+EPA per day (EFSA heart claim)
- Take with food — fatty acids are better absorbed with fat
- Storage — keep cool, as polyunsaturated fatty acids are sensitive to oxidation
Typical dosages: 250–1000 mg DHA+EPA per day from algae oil.
Who especially needs algae omega-3?
- Vegans — algae omega-3 is the only plant-based source of DHA and EPA. Without supplementation, it is virtually impossible for vegans to obtain adequate DHA
- Vegetarians — those who do not eat fish need an alternative DHA source
- Pregnant and breastfeeding women who are vegan — DHA is critically important for foetal brain and visual development
- People with fish allergy — algae oil is a fish- and crustacean-free alternative
- Sustainability-oriented consumers — algae oil production does not require overfishing or harm ocean ecosystems
Frequently asked questions
Isn't flaxseed oil (ALA) enough?
Flaxseed oil contains ALA (the short-chain form of omega-3), but the body converts very little ALA to DHA (0.5–5%). Direct DHA consumption from algae oil is far more effective.
Is algae oil as effective as fish oil?
Yes, since EPA and DHA are chemically identical regardless of source (Ryan & Symington, 2015). EFSA claims apply to both sources. What matters is ensuring adequate DHA/EPA intake.
Does algae oil taste bad?
Algae oil typically has a more neutral flavour than fish oil. With capsules, taste is minimal.
Is algae oil more environmentally friendly than fish oil?
Algae oil production occurs under controlled conditions (fermentation) and does not directly impact ocean ecosystems. This makes it a more sustainable alternative, although fermentation also requires energy.
Can children take algae oil?
DHA contributes to normal brain and visual development in children (EFSA claim). Specific dosages should be discussed with a doctor.
Does algae oil contain heavy metals?
Since algae are cultivated under controlled conditions (not harvested from the ocean), the risk of heavy metal contamination (mercury, lead) is minimal (Adarme-Vega et al., 2012) — unlike some fish oils.
References
1. Lane, K.E. & Derbyshire, E.J. (2014). Omega-3 fatty acids — a review of existing and innovative sources of long-chain omega-3. Proceedings of the Nutrition Society, 73(OCE1), E30.
2. Brenna, J.T. (2002). Efficiency of conversion of alpha-linolenic acid to long chain n-3 fatty acids in man. Current Opinion in Clinical Nutrition & Metabolic Care, 5(2), 127–132.
3. Ryan, L. & Symington, A.M. (2015). Algal-oil supplements are a viable alternative to fish-oil supplements in terms of DHA. Journal of Functional Foods, 19, 852–858.
4. Adarme-Vega, T.C., Lim, D.K.Y., Timmins, M., Vernen, F., Li, Y. & Schenk, P.M. (2012). Microalgal biofactories: a promising approach towards sustainable omega-3 fatty acid production. Microbial Cell Factories, 11, 96.
5. EFSA Panel on Dietetic Products, Nutrition and Allergies (2010). Scientific Opinion on the substantiation of health claims related to EPA, DHA and maintenance of normal cardiac function. EFSA Journal, 8(10), 1796.
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Disclaimer
A food supplement is not a substitute for a varied and balanced diet and a healthy lifestyle.
