Best Omega 3 UK 2026: Fish Oil and Vegan Capsules Compared

Walk down the supplement aisle and every tub shouts a big number at you. 1000mg. 2000mg. 3600mg. Almost none of those numbers describe the thing you are buying, because they measure the oil, not the omega 3 inside it, and a standard 1000mg fish oil capsule carries only about 300mg of EPA and DHA between them. That single piece of label literacy separates a supplement worth taking from an expensive way to make your kitchen smell of sardines.

Below are six omega 3 supplements sold on Amazon UK that stand up when you read the small print, covering fish oil, cod liver oil and algae for vegans. The NHS advises at least one 140g portion of oily fish a week as the richest source of long-chain omega 3, and a capsule is best treated as insurance for the weeks that does not happen.

1. Bare Biology Life & Soul Super-Strength Fish Oil: Best Overall

Bare Biology is the one to buy if you care more about what goes in than what it costs. Two capsules give you roughly 1,700mg of omega 3, weighted heavily towards EPA, which is several times what a bargain 1000mg softgel delivers. The oil is in triglyceride form rather than the cheaper ethyl ester, it is third-party tested for purity, and the capsules genuinely do not repeat on most people.

The catch is money. At around £33 for a month you are paying five or six times what the budget picks cost per day, and Bare Biology's marketing leans into a wellness aesthetic that will grate on anyone who just wants fish oil. If you take omega 3 seriously enough to read the EPA number, though, this is the product that respects that.

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2. Nutravita Omega 3 2000mg: Best Value

This is the pick most people should default to. Each two-softgel serving carries 660mg EPA and 440mg DHA, the tub holds 240 softgels, and that works out at roughly four months of daily use for about the price of two coffees a week. Nutravita is a UK brand that publishes its sourcing and certificate of analysis, and its supplements sell in serious volume on Amazon UK.

Two honest gripes. The softgels are large, so anyone who struggles swallowing capsules should look at the smaller Igennus below, and a minority of buyers report a fishy aftertaste towards the end of a tub, which usually points to storage in a warm kitchen rather than a bad batch. Keep it cool and dark.

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3. Bulk Super Strength Omega 3 Softgels: Best Budget

Bulk sells to lifters who buy protein by the 5kg sack, and its omega 3 follows the same logic: plain packaging, low price, no story. A pack of 90 softgels costs around £12, which makes it the cheapest credible option here, and if you already order creatine or whey from Bulk you can drop it in the same basket.

Be clear about what you are getting. These are standard strength softgels, so you need two or three a day to reach a meaningful EPA and DHA total, and the 90-capsule pack empties fast at that rate. The 270 and 540 packs work out cheaper per capsule if you know you will keep taking them.

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4. MAV Nutrition Triple Strength Omega 3 3600mg: Best High Dose

Triple strength means the oil is concentrated, so you get over 2,100mg of omega 3 from a serving instead of the 300mg a basic softgel manages. For anyone who has been told to raise their intake, or who simply hates swallowing four capsules a day, that concentration is the whole point. Higher intakes are also where the research on blood lipids sits: one dose-response trial found 3.4g of EPA plus DHA a day lowered triglycerides by 27% while a nutritional 0.85g dose did nothing measurable.

That study is also the reason for a warning. Doses at that level are pharmaceutical territory, they can thin the blood, and they belong in a conversation with your GP rather than a shopping basket, particularly if you take anticoagulants. Taken as directed, this is a well-priced concentrate; taken as a self-prescribed treatment, it is not a good idea.

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5. Igennus Vegan Omega 3 Algae Oil: Best Vegan

Most vegan omega 3 products are DHA with a token amount of EPA, which is a problem if EPA is what you were after. Igennus builds its algae oil around a more even split, delivering 600mg of combined EPA and DHA, and the softgels are noticeably small, which matters when you are taking them every day. No fish, no repeat, no sustainability guilt about krill.

It is pricier per milligram than fish oil and always will be, because growing algae in tanks costs more than pressing sardines. Sixty softgels also go quickly at the recommended serving. For vegans, vegetarians and anyone who simply cannot stomach fish oil, it remains the sensible choice, and it sits alongside the Opti3 vegan omega 3 and Omvits options we have looked at before.

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6. Seven Seas Cod Liver Oil One-A-Day: Best Cod Liver Oil

Your grandmother's supplement, and still a reasonable buy. One capsule a day, 120 capsules in the tub, four months on the shelf for about a tenner, plus vitamin D that most of us are short of between October and March. Seven Seas has been made in the UK since the 1930s and the brand recognition is not nothing when you are buying an oil you cannot inspect.

Read it for what it is. The EPA and DHA per capsule are modest next to any high strength fish oil here, and cod liver oil carries vitamin A, so do not stack it with a multivitamin and a separate retinol supplement without checking the totals. Buy it for the vitamin D and the convenience, not to hit a big omega 3 number.

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How to read an omega 3 label

Turn the tub around and find three numbers: EPA, DHA, and the serving size that produces them. If the front says 1000mg and the back does not mention EPA at all, that is a cheap standard oil and you will need three or four capsules to match one high strength serving.

After that, look at the form. Triglyceride form absorbs better than ethyl ester, though ethyl ester products are cheaper and still work; brands that use triglyceride form say so, loudly. Freshness matters more than most buyers realise, since oxidised oil is what causes the awful repeat, so buy from a shop with fast turnover, store the tub away from the hob, and stop taking any oil that smells rancid.

Which omega 3 should you buy?

• Best overall: Bare Biology Life & Soul if you want the highest quality oil and the fewest capsules, and you accept the price.
• Best value: Nutravita Omega 3 2000mg is the four-month tub that most people should buy without much further thought.
• Best budget: Bulk Super Strength Omega 3 for the cheapest credible capsule, as long as you take two or three a day.
• Best high dose: MAV Nutrition Triple Strength concentrates the oil so one serving does the work of several, with the medical caveat above.
• Best vegan: Igennus Vegan Omega 3 has the EPA and DHA balance most algae oils lack, in a small softgel.
• Best cod liver oil: Seven Seas One-A-Day for winter vitamin D in a single daily capsule.

None of this replaces food. Two portions of oily fish a week beats any capsule, and if you are already eating salmon, mackerel or sardines regularly you may not need a supplement at all. If you take blood thinners, are pregnant, or have a fish or shellfish allergy, speak to a pharmacist before starting one.

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