Omega-3 & fish oil

Fish and algae oils judged on freshness, purity and the EPA and DHA you actually get.

How we rank omega-3 & fish oil

Ingredients 20%
Freshness & purity testing 35%
Sourcing 15%
Trust 15%
Value 15%

Why, and what each one means

Fish oil spoils and can carry contaminants, so freshness and purity testing carries the most weight (35%), and independent tests count most. In Consumer Reports’ April 2026 report, three of 20 fish oils showed signs of rancidity (CR (opens in a new tab)), and flavoring makes freshness hard to measure; unflavored capsules did better in a Canadian survey (PubMed (opens in a new tab)). Dose matters: our dosing guide suggests 250 to 500 mg a day, and trials above 1 g a day showed more atrial fibrillation (PubMed (opens in a new tab)).

Ingredients 20%: EPA and DHA per serving stated, from fish, krill or algae oil, with no artificial flavor or color.
Freshness & purity testing 35%: Oxidation (peroxide, anisidine, TOTOX), heavy metals, PCBs and dioxins tested per batch, with results published. Independent tests count most.
Sourcing 15%: Small fish or algae, with the species and fishery named and a sustainability listing.
Trust 15%: Highest when the maker names everything, answers questions, and has no recalls, warning letters, Prop 65 notices or lawsuits over safety or labeling. Points come off for unresolved problems and for paid promoters it does not disclose.
Value 15%: Price per gram of EPA and DHA against the others here that pass.

Each product scores every one from 1 to 5, and its rating is the weighted average. We list only products rated 3 or above that break none of our rules.

We avoid

“Total omega-3” with no EPA and DHA breakdown.
Capsules that smell strongly rancid or taste of old fish.
Bargain bottles with no lot-level test report.
High doses without checking with a clinician first if you take blood thinners or have atrial fibrillation.