How many peptides exist?

There is no complete count. The body makes thousands of its own peptides, and labs have made thousands more. This site does not hold a count of every peptide in nature or in every catalogue. What it can count is the compound profiles published here, a number worked out and printed on /methodology, plus the studies in people those profiles hold. A sales list of '200 peptides' or '500 peptides' is not that count. This FAQ does not invent a world total.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of research peptides, the category. What research peptides are, legally and practically, before getting into specific compounds.