The Book of Peptides is not a clinic and not your doctor. We do not sell, prescribe, recommend, or personalize any compound, and no grade or ranking here is an endorsement. In the United States, most of these compounds are not FDA-approved and are sold for laboratory research only; a few are prescription drugs, and some are controlled substances or banned in sport. Possessing or administering an unapproved compound outside an authorized setting may be unlawful. Nothing here is a recommendation to buy, possess, or self-administer anything. Consult a licensed physician before any decision involving peptide use.
A synthetic pentadecapeptide derived from a protective compound in gastric juice, with an enormous animal literature – over a hundred published studies, almost all from a single Zagreb research group. The human picture is far thinner: a handful of small pilot studies, none randomized or placebo-controlled, and a 2015 registered Phase I trial that never published its results.
