Kirkland Signature · Omega-3

Fish Oil (Concentrated)

“Mostly honest and mostly effective, with a soft spot or two.”

Mostly worth it · score 83.9/100

evidence: high certainty — 2 tier-A sources

solid, transparent formula

Graded better in Omega-3

Per-ingredient breakdown

serving: 1 softgel
A 2400×1260 PNG — post it natively, no screen recording.

Source: Manufacturer / NIH DSLD · Label last checked 2026-07-18 · verified

Substitution: Kirkland 1000 mg is off-market in DSLD; this is Kirkland concentrated fish oil (label 207311, USP Verified). Ethyl-ester form absorbs slightly less well than triglyceride.

This grade is a ceiling: it assumes the label is accurate. Laboratory testing can only lower it.

Supplement formulas change. This verdict reflects the label data on file as of its source date. Always confirm against the physical label before you buy. Unsold grades formulas, not brands — and we're not doctors. This is information, not medical advice; check with a qualified healthcare professional before changing what you take.

UNSOLD

Deterministic supplement grading. Same label in, same verdict out — no accounts, no affiliate links, nothing to sell you. Grades formulas, not brands. Not medical advice.