What is a good EPA to DHA ratio?

The goodness test: three checks that replace the whole debate

After a trilogy of ratio pages this site can compress the answer to a test, because good, applied to a ratio, only ever meant three verifiable things. Check one, the combined total: add the EPA and DHA lines and hold the sum against your actual target, 250mg-plus for the everyday claim territory, gram figures only inside the deliberate territories, since every flagship claim reads the pair combined and split-blind, which makes the combined number the only one any mandate recognises. Check two, the conditional DHA floor: if, and only if, your goal is the brain-function or vision claims, the DHA line alone must reach 250mg, the single place in the entire register where the split matters, met by DHA-rich and algae products and missed by EPA-skewed ones by design. Check three, the price of the split: a good ratio ships free, because in honest products the ratio is simply what the oil is, the fish's own near-3:2 in standard oils, whatever the concentrate's process produced in strong ones, and any premium charged specifically for a celebrated split is buying an unmandated theory, the walk-away the inspection pages price out.

Running the test on the shelf's actual ratios

Apply the test to the ratios a UK shelf actually offers and the verdicts write themselves. The standard 3:2, roughly 180mg EPA to 120mg DHA per 1000mg softgel: passes for the everyday buyer, the combined 300mg clearing check one, check two not applying to most, check three passed by definition since nothing extra is charged, which is why this site's default answer to the whole genre is the ratio nobody advertises. The EPA-heavy 2:1 and 3:1 concentrates: pass check one at gram targets, fail check two for DHA-claim shoppers by construction, and face check three hardest, their mood-research parentage often billing a premium the mandate ledger cannot justify. The DHA-heavy and algae profiles: the one aisle where a skew earns its keep, passing check two for the brain-and-vision buyer, judged on checks one and three like everything else. And the unstated ratio, a label offering only a family-name total: fails before the test begins, since a ratio you cannot compute belongs to member lines you were never shown, the two-line habit's oldest walk-away. Good, it turns out, was never a number; it was a receipt.

The verdict, and the ratio question retired

What is a good EPA to DHA ratio: any ratio holding a receipt, which the three checks issue in under a minute, combined milligrams against the target, the 250mg DHA floor for the one goal that earns a skew, and a split that ships free, a test the fish's own unadvertised 3:2 passes so comfortably that the everyday answer was sitting in the ordinary softgel all along. The worked example is that answer with its receipt attached: Futuro Labs Omega 3 Fish Oil, 180mg EPA and 120mg DHA declared per softgel, 300mg combined for check one, no split premium for check three, one a day with dinner, £14.99 for 90 days at 17p, lab-tested, UK made. The ratio genre asked which numbers were magic; the honest answer, four pages later, is that the magic was the adding up.

What to check on the label

Questions people also ask

Is a 3:2 EPA to DHA ratio good?

Yes, and it is the standard: the fish's own profile, roughly 180mg to 120mg per softgel, passing the goodness test at no premium, which is why nobody bothers advertising it.

Is a higher EPA ratio better?

Only for a deliberate EPA-forward research plan at fair per-gram prices: no mandate rewards the skew, and it disqualifies the product from the DHA-specific claims.

When does the ratio actually matter?

Once: the brain-function and vision claims require 250mg of DHA specifically, which is the single place the register reads the split rather than the sum.

What if a product doesn't state its ratio?

Then it has not stated its member lines, and the two-line habit walks away: a ratio you cannot compute is a total you cannot trust.

So what should I actually buy?

Whatever passes the three checks at the best price: for most people that is the standard 3:2 softgel at 300mg combined, with DHA-rich products reserved for the one goal that earns them.

Sources

1. Futuro Labs Omega 3 Fish Oil listing: 1000mg fish oil per softgel providing 180mg EPA and 120mg DHA, 90 softgels. Amazon UK, accessed 31 August 2026. https://www.amazon.co.uk/dp/B0CP9T3BTN
2. EFSA Panel on Dietetic Products. Scientific opinion on the substantiation of health claims related to EPA and DHA and normal function of the heart (250mg daily condition of use). EFSA Journal 2010;8(10):1796. https://www.efsa.europa.eu/en/efsajournal/pub/1796
3. EFSA Panel on Dietetic Products. Scientific opinion on health claims related to DHA: maintenance of normal brain function and normal vision (250mg DHA daily condition of use). EFSA Journal 2010;8(10):1734. https://www.efsa.europa.eu/en/efsajournal/pub/1734
4. Meta-analytic evidence on EPA-predominant omega-3 formulations in depression research: better signals for EPA-heavy preparations in clinical trial populations, with no authorised claims arising. PubMed record
5. EFSA Panel on Dietetic Products. Scientific opinion on the tolerable upper intake level of EPA, DHA and DPA: supplemental intakes of EPA and DHA combined up to about 5g/day do not raise safety concerns for adults. EFSA Journal 2012;10(7):2815. https://www.efsa.europa.eu/en/efsajournal/pub/2815

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