FDA Peptide Warning Letters Show Research Use Only Labels Did Not Shield Online Vendors
FDA's August 24, 2026 warning letters to Peak Performance Peptides, Royal Peptides, NuScience Peptides, Peptide Partners, and Tex Peptides set aside research use only disclaimers and list the product pages, study summaries, blog posts, calculators, and bacteriostatic water that FDA treated as evidence of intended human use.