What collagen brands can legally claim: structure/function claims, the 101.93 disclaimer, why PDCAAS zero blocks protein claims, and sourcing claim rules.

GHK-Cu serums are cosmetics; GHK-Cu vials are unapproved drugs. Where FDA draws the line, hair-growth claim risk, compounding status, and compliant claims.

Oral food-derived peptides can be supplements. Injectables and nasal sprays are automatically drugs. How route of administration decides FDA status in 2026.

A 10-point FDA/FTC compliance checklist for peptide brands: ingredient status, claims and disclaimers, influencer monitoring, label panels, and AER readiness.

Matrixyl and argireline serums live on the cosmetic-drug line. Which anti-aging claims stay cosmetic, which become drug claims, and what MoCRA now requires.

Collagen peptides are legal supplements. BPC-157 and GLP-1 peptides are not. Where FDA draws the line, recent warning letters, and how peptide brands comply.