Peptide testing services, city by city.

Gold Standard Analytics is one independent, ISO 17025-aligned laboratory in Houston, TX. We serve the 50 largest US metros — and everywhere in between — by prepaid mail-in: HPLC purity, LC-MS identity, net peptide content, TFA residual, and injectable-grade endotoxin / sterility on a public, QR-verifiable COA. Pick your city for local turnaround details.