It is not, on its own, evidence that they work for it
BPC-157 Protocols: The Essential Handbook for Regeneration and Health: BPC157 Peptides
Because research-market material is sold outside any approved supply chain, its identity and purity are unverified: trial data describe a characterized study drug, not the contents of an arbitrary vial, so a batch certificate of analysis is the minimum a research setting should require
Users maintaining excellent sun protection, adequate moisturization, healthy diet supporting collagen synthesis (adequate protein, vitamin C, copper from foods), sufficient sleep, stress management, and avoidance of collagen-damaging habits (smoking, excessive alcohol) preserve treatment gains better than users with suboptimal skincare and lifestyle creating ongoing skin stress overwhelming GHK-Cu induced improvements