Ask anything about peptides. Get a straight answer.

Peptides are short chains of amino acids — the same building blocks as proteins, but smaller. In your body, peptides act as signaling molecules: tiny messengers that tell cells to repair tissue, release hormones, regulate metabolism, or modulate the immune system.

Synthetic peptides mimic or amplify these natural signals. Because each targets specific pathways, researchers study them for everything from injury recovery to cognitive support. Most peptides discussed here are sold as research chemicals, not approved drugs for human use.