Most buying advice ranks brands. We'd rather show you the handful of specifics that decide whether something can do the job you're buying it for — and where to find them yourself.
Almost every purchase is sold to you on the front of the box. The information that determines whether it will work for you is somewhere less convenient: the back of the label, page four of the coverage summary, the line in the estimate about what isn't included.
That's the part we cover. Every piece here is built the same way — a short list of things you can verify yourself, on the seller's own page, in about a minute. If our reasoning holds up, you should be able to run the same checks on something we never wrote about and reach your own conclusion.
We'd rather teach you the check than hand you a ranking. Rankings go stale. Checks don't.
There are five researched types of collagen and no single animal source contains all of them — which means most tubs on the shelf are structurally capped at two. Here's the full label check, including the amino acid question almost nobody runs.
Read the check →Type I is skin. Type II is cartilage. They are not interchangeable, and most labels never name a type at all.
Why a blend can list impressive ingredients without telling you the dose of any of them.
Sticker price is close to meaningless when sizes differ. The arithmetic that fixes it.
I started this site because I kept watching people I know buy things on the strength of a headline, then quietly wonder months later whether it had done anything at all. Usually the answer was sitting in the fine print the whole time, in a form nobody had bothered to explain.
So the standard here is narrow and I'd like to keep it that way: publish the checks, show where to find them, and be straight about how the lights stay on. This site earns money from advertising and from commissions when readers act on a recommendation. That's disclosed on every page where it applies, and it doesn't change what we report.
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