"Omega-3" isn't one product — it's three genuinely different sources with different chemistry, different EPA/DHA balances and different suitability. Fish oil dominates the shelf, krill oil has grown fast on the back of astaxanthin marketing, and algae oil is quietly the only option that's actually vegan. Here's the honest comparison, mechanism first.
Why Algae Oil Exists at All
Here's the detail most people never learn: fish don't make omega-3. They accumulate it by eating algae, directly or through the food chain. Algae oil skips the middleman — the same marine organisms that put omega-3 into fish in the first place, without the fish. That makes it the only source of the three that's genuinely vegan, not just "plant-based marketing."
Fish Oil — The Default, For a Reason
Fish oil delivers EPA and DHA bound to triglycerides, generally at the highest concentration per capsule and the lowest cost. OmegaBalance combines fish, flaxseed and sunflower oils for omega-3, 6 and 9 in one capsule — 1000mg total, halal approved. The honest trade-off: the fishy aftertaste that puts a meaningful share of users off fish oil entirely, and it's not vegan or vegetarian.
Krill Oil — Different Delivery, Same Animal Origin
Krill oil carries omega-3 bound to phospholipids — the same molecular form as your cell membranes — plus naturally occurring astaxanthin, an antioxidant fish oil doesn't have. AstaxaKrill is our phospholipid option: most people find it avoids the fishy aftertaste fish oil causes. Still not vegan — krill is a crustacean — and typically lower EPA+DHA per capsule than concentrated fish oil. Full comparison: krill oil vs fish oil.
Algae Oil — The Vegan Route
Algae-derived DHA is the only omega-3 source that's actually compatible with a vegan diet — not an approximation, the real thing, since it's where fish get theirs from in the first place. The typical trade-off: algae oil products tend to be DHA-dominant with comparatively less EPA than fish oil, and often cost more per milligram of omega-3 due to production complexity. If EPA specifically is your priority — heart-function research leans on EPA+DHA combined — check the split on any algae product before buying.
What the EU-Authorised Claims Actually Require
Whichever source you choose, the same regulatory thresholds apply, because they're claims about EPA and DHA, not about origin:
- Heart function — 250mg EPA+DHA combined daily
- Brain function and vision — 250mg DHA daily
- Blood pressure — 3g EPA+DHA daily
- Blood triglycerides — 2g DHA with EPA daily
Check any product's actual EPA+DHA content against these thresholds rather than trusting "omega-3" on the front of the label — source doesn't change the maths.
Which Should You Choose?
- Budget and dose per capsule matter most: fish oil
- You dislike fishy aftertaste but aren't vegan: krill oil
- You're vegan, vegetarian, or have a fish/shellfish allergy: algae oil is the only genuine fit
- You want the antioxidant bonus: krill oil's astaxanthin, or a pairing with Red Punch
FAQs
Is algae oil as good as fish oil?
For DHA specifically, yes — it's the original source. For EPA, algae products typically deliver less than concentrated fish oil, so check the split if EPA matters to your goal.
Is krill oil better than fish oil?
Different rather than better — phospholipid delivery and astaxanthin vs typically higher EPA+DHA concentration at lower cost. Neither is vegan.
What's the only vegan omega-3 source?
Algae oil. Fish and krill oil are both animal-derived regardless of how they're marketed.
Why do fish have omega-3 if they don't make it?
They accumulate it by eating algae, directly or through smaller fish that ate algae. Algae oil supplements bypass that food chain entirely.
Browse the full Halal Vitamins UK collection.
Food supplements should not replace a varied diet. Consult your GP before use if pregnant, breastfeeding, taking blood-thinning medication, or managing a diagnosed condition.
