Omega-3 source and labels: UK buying dossier
Fish oil, algae oil and other omega-3 products can use different quantity bases. Separate the oil mass from explicitly labelled fatty-acid amounts.
Compare source and EPA/DHA rather than total oil alone
Fish oil, algae oil and other omega-3 products can use different quantity bases. Separate the oil mass from explicitly labelled fatty-acid amounts.
Fish, algae or other source
01Compare: Record the stated source and exact ingredient, including fish species or algal source only when declared.
Why it matters: Source affects dietary and allergen decisions but does not establish quality.
Evidence check: Use the current ingredients list and allergen wording.
EPA and DHA amounts
02Compare: Compare explicitly labelled EPA and DHA amounts separately from total fish oil, algae oil or omega-3 blend mass.
Why it matters: A larger oil number can contain a different disclosed EPA/DHA amount.
Evidence check: Keep each amount, unit and stated portion together; mark absent values as unknown.
Format, allergens and additions
03Compare: Compare capsule or liquid format, fish allergen declaration, flavourings, antioxidants and other added nutrients.
Why it matters: A flavoured liquid and a capsule can differ in ingredients, storage and use.
Evidence check: Check the exact variant’s full label and capsule material.
Portion, storage and claims
04Compare: Compare stated units per portion, storage after opening and any authorised claim conditions.
Why it matters: Freshness and claim eligibility cannot be inferred from source or total oil alone.
Evidence check: Read durability and storage directions and verify claim conditions against the labelled amounts.
Three checks before checkout
Enough detail to make the choice better informed and clearer, without turning a quick buying decision into a compliance manual.
- 1 Identify fish, algae or other source, EPA and DHA amounts where stated, allergens, pack format and applicable claim conditions.
- 2 Match the exact flavour, variant, pack and formula rather than a similar marketplace image.
- 3 Use the current physical label for ingredients, allergens, warnings and stated serving information.
Take the next useful step
Continue to the closest practical comparison or official source.
Why these checks matter in the UK
Compare the food label, ingredients, amount per stated serving, warnings and allergens; do not use the page as medical advice.
Food supplements are regulated as foods rather than medicines.
Great Britain · current
Treat a claim as a constrained label statement, not proof that the product will deliver the outcome for a particular person.
Nutrition and health claims used in Great Britain need an authorised basis and must meet the exact conditions of use.
Great Britain · current
Check the market named on the label and use the matching official source rather than assuming one UK-wide claims register.
Some food-supplement and claims rules differ between Great Britain and Northern Ireland.
Great Britain, Northern Ireland · current
Sources and review boundaries
- Department of Health and Social Care: Food supplements guidance — reviewed 2026-08-03; Food-supplement rules differ between Great Britain and Northern Ireland in some areas.
- Department of Health and Social Care: Great Britain nutrition and health claims register — reviewed 2026-08-03; A listed claim remains subject to its exact conditions of use and the product label.