Shop

Research peptides in the USA — lab-tested, every lot

Peptides21 supplies research-grade peptides in the United States, with a focus on purity, independent testing and clear documentation. Browse the full peptide catalog, or shop by research area: metabolic, growth-hormone axis, tissue repair, skin & longevity and cognitive.

Every lot is tested by an independent laboratory, and the certificate of analysis is published on our lab reports page — so you can check identity and purity before you buy.

The catalog includes BPC-157, TB-500, RT, MOTS-c, Semax, Selank, CJC 1295, Tesamorelin, GHK-Cu, GLOW, Melanotan 2 and NAD+, plus bacteriostatic water for reconstitution. Save on multi-compound projects with our bundles.

Orders ship within the US, free over $150 — see shipping. Need help with concentrations? Use the reconstitution calculator or contact us.

All products are supplied for laboratory research use only.