Wellness peptide craze: why people are injecting drugs 'not for human consumption' Dr Tahera explains that the topical version of GHK Cu and how it supports skin repair and rejuvenation. This is the cream based approach. Injectables? We'll cover that next. Because understanding your options matters. GHK Cu 20mg + BAC Water skin and hair renewal Synthagen Synthagen PL Copper Peptides: GHK Cu is your skin's built in botox Fatskn GHK Cu Revival Clinic GHK Cu Peptide: What It Does for Body Composition and Metabolic Health