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How We Review Products

Every review on this site goes through the same 4-step process before it's published. Here is exactly what we check, in the order we check it.

Step 1 — Label verification

We start with the supplement facts panel, not the sales page. We list every ingredient exactly as it appears on the label, with its stated dose where the label discloses one. If a product hides doses inside a "proprietary blend," we say so — because it means you can't compare it against the doses used in published studies.

Step 2 — Ingredient research check

For each ingredient, we look at what published, peer-reviewed research actually found — not the marketing page's summary of it. We distinguish between three levels of evidence and label them in the review:

• Studied at this dose: human trials exist using a comparable dose.
• Studied, but not like this: research exists, but at different doses, in animals, or in different populations.
• Traditional use only: no meaningful clinical research behind the claim.

Step 3 — Real pricing audit

We record the current price of every package on the seller's official checkout — including shipping — on the date of the review. We calculate the real cost per day for each package, because "one bottle" pricing is often designed to make the six-bottle package look cheaper than it is. When a product is sold on unauthorized marketplaces (Amazon listings not run by the manufacturer, for example), we flag it: those purchases are usually not covered by the official guarantee.

Step 4 — Refund-policy test

We read the full refund policy and translate it into plain English: how many days you have, whether opened bottles count, who pays return shipping, and the exact address or process for claiming it. If advertisers describe the guarantee incorrectly — and we've caught paid ads promising the wrong refund window — we point it out.

How verdicts are scored

Each product gets a score out of 5, built from four weighted parts: ingredient evidence (40%), label transparency (20%), value for money (20%), and guarantee strength (20%). A product with strong marketing but hidden doses cannot score well here. We publish the cons of every product, including ones we recommend — a review with no cons isn't a review.

What we don't do

• We don't accept payment from manufacturers to write, change, or remove a review.
• We don't sell any product ourselves — purchases happen on the seller's site, under the seller's guarantee.
• We don't give medical advice. Supplements are not a substitute for diagnosis or treatment, and we tell readers when the honest answer is "see your doctor first."

Corrections policy

Prices, terms, and formulas change. Every review shows the date it was last checked. If you spot something out of date, tell us — flagged pages get re-checked and updated with a correction note.