A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Amazon.com : dermaFIT Extra Strength Muscle Maintenance Cream, Post Workout Recovery & Strength, Double Enhanced Effect of Muscle Loss Prevention, 200ml, No Artificial Fragrance Topical Analgesic for Muscle : Beauty & Personal Care Copper peptide GHK Cu Wikipedia KPV and GHK Cu petide stack + Creatine HCL and relativelt consistent diet #NotABodyBuilder. Jiu jitsu competitor and K9 handler. Ideally would like to grow lower legs to match quads but struggle there.