Peptide Index is a free reference community for research peptides, written in plain English.
The Classroom covers every major compound (BPC-157, TB-500, GHK-Cu, Ipamorelin, CJC-1295, Tesamorelin, tirzepatide, retatrutide, NAD+, Epithalon, Semax, DSIP, Kisspeptin and more): what the studies found, how it works, what people use it for, dosing figures, side effects. Plus the practical side: reconstitution, the dosing math, storage, injection technique, supplies, and how to read and verify a certificate of analysis.
Rules: be civil, no vendor promotion, no medical advice to other members, no sourcing requests. Research peptides are sold for research use only and are not approved drugs. Nothing here is medical advice.