Measured, not claimed
A label can say "800 mg EPA." The IFOS batch test says what was actually in the softgel. We rank on the tested number, so an honest over-delivering product beats a padded label.
The fish oil most brands don't want compared.
"Best fish oil" lists rank on label claims and vibes. We rank on the one number that actually matters: cost per gram of real, lab-measured EPA+DHA — using the public IFOS third-party test certificate for each product, not the number printed on the box. Freshness (TOTOX), oil form, and heavy-metal results are in the table too.
How we're paid & what we claim: some product links are affiliate links — if you buy through them we may earn a commission, at no cost to you. That never changes the ranking; rows are ordered purely by the math below. We restate published certificate numbers with attribution and make no health, benefit, or treatment claims.
Omega-3 ranked by cost per gram of actual EPA+DHA
| # | Product | $ / g actual EPA+DHA |
Measured EPA+DHA / serving |
vs. label claim |
TOTOX (freshness) |
Form | IFOS | Cert |
|---|
$ / g actual EPA+DHA = current iHerb price ÷ (measured EPA+DHA per serving × servings per container ÷ 1000). Measured values are the IFOS certificate's batch result — the lab number, not the label. vs. label claim = measured ÷ claimed: 100% = exactly as labeled, over 100% = over-delivers (good — reputable brands add overage so the claim still holds as the oil ages), under 100% = short of its claim (red). Every certificate is linked; click to verify any number yourself. Prices are checked periodically and drift — the linked iHerb page is always authoritative.
Also cheap per gram — but self-tested, not independently certified
California Gold Nutrition is iHerb's own house brand, and the numbers below come from iHerb's in-house "iTested" program — not an independent certifier like IFOS. On cost per gram they can look excellent, but a store grading its own product isn't the same as independent third-party testing, so we keep them out of the ranking above and show them here for transparency. Judge them accordingly.
| Product | $ / g actual EPA+DHA |
Measured EPA+DHA / serving | vs. label claim | TOTOX | Form | Test | Report |
|---|
Why this ranking is different
Per gram of omega-3, not per bottle
A "cheap" bottle with weak, ethyl-ester oil can cost more per real gram of EPA+DHA than a pricier concentrate. The per-gram math is the only fair way to compare.
Freshness is in the table
Oxidized fish oil is common and unpleasant. TOTOX is the standard freshness number; lower is fresher. We show it next to price so cheap-but-rancid can't hide.