Profiles for 22 of the most-discussed peptides. Each page carries a status badge and a caution tier up top, then formula, indications, contraindications, commonly-reported dosing and routes, interactions, stacking, and what research actually exists.
How to read the badges
FDA-approved drug
Investigational – in trials
Off Cat. 2 – PCAC review pending
Compounding-restricted (Cat. 2)
Research-use-only / grey market
Investigational – in trials
Off Cat. 2 – PCAC review pending
Compounding-restricted (Cat. 2)
Research-use-only / grey market
Higher-caution
Moderate-caution
Notable unknowns
Moderate-caution
Notable unknowns
"Off Cat. 2 – PCAC review pending" means the FDA removed it from the do-not-compound list in 2026 but it is not yet authorised — see the Legal status page. "Caution tier" is an editorial reading of the risk/uncertainty balance, not a clinical rating. Even "moderate" items are unproven for most uses.
Semaglutide
Metabolic / GLP-1
Tirzepatide
Metabolic / GLP-1 + GIP
Retatrutide
Metabolic / triple agonist
Tesamorelin
Growth-hormone axis (GHRH analogue)
Sermorelin
Growth-hormone axis (GHRH analogue)
CJC-1295
Growth-hormone axis (GHRH analogue)
Ipamorelin
Growth-hormone axis (secretagogue)
IGF-1 LR3
Growth factor (IGF)
BPC-157
Tissue repair / recovery
TB-500
Tissue repair / recovery
GHK-Cu
Skin / tissue (copper peptide)
KPV
Anti-inflammatory
MOTS-c
Mitochondrial / metabolic
AOD-9604
Metabolic / fat loss
PT-141
Sexual function (melanocortin)
Melanotan I
Pigmentation / melanocortin
Melanotan II
Pigmentation / melanocortin
Selank
Neuropeptide (anxiolytic / nootropic)
Semax
Neuropeptide (nootropic)
Epitalon
Longevity (pineal peptide)
Thymosin Alpha-1
Immune modulation
DSIP
Sleep / neuropeptide