DisclosureWe earn commission on partner links; ranking is set by our evidence-based methodology — not advertisers. Read policy
How we source claims, score products, keep prices current and correct mistakes — and what we don't do.
Clinical claims are built from primary sources — FDA labeling, peer-reviewed studies indexed in PubMed, and government health agencies. Company pages and news reports are cited for business facts such as pricing, ownership and availability, not as clinical evidence.
Every review, comparison and best-of ranking ends with a numbered list of the sources behind it, linked so you can open the original and check it yourself. Dead links are replaced or removed when we find them.
Every product is scored on the same six axes — effectiveness, safety, value, accessibility, user experience, and trust — with the weights published openly on our methodology page.
We do not claim to buy and lab-test products ourselves. Where we describe efficacy or safety, we cite the FDA, NIH, and published trials — and we say plainly when evidence is company-sponsored, preliminary, or absent.
Each verified price shows the date it was checked and links to the official pricing page it came from. An automated check runs on the 1st of every month and flags any price that no longer appears on its source page — or whose page blocks automated checks — for a manual re-check. Discontinuations and major availability changes are noted at the top of the affected review.
We earn affiliate commissions on some products, disclosed on every page. Commission is not an input to our scoring rubric, and products we earn nothing from are ranked and linked the same way.
Found a claim you can't trace to a source, or a price that's out of date? Email [email protected] — we'll add the source or correct the claim and date the change in our corrections log. Read the full scoring methodology or our editorial & independence policy.