FDA Moves on Peptides: What Compounding Pharmacies Need to Know Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance[v3] Preprints.org Everyone online is suddenly injecting peptides. But almost nobody understands the scienceor the regulation. The FDA recently shifted several peptides off the Category 2 safety risk list tied to compounding rules. First, that Peptides went from niche bodybuilding compounds to mainstream wellness culture in under five years. The appeal makes sense on the surface, naturally occurring, targeted mechanisms, marketed as smarter than traditional pharmaceuticals. What More Americans are injecting themselves with peptides