GHK CU: Topical vs. Injectable for Skin & Hair Growth TikTok Injectable vs Topical GHK CU: Which Copper Peptide Form Works Best? Sama Says Amazon.com: GHK Cu Copper Peptide Serum Anti Aging Face Serum for Skin Firming, Wrinkle Reduction, Hydration & Collagen Boosting, 30ml(1 fl oz) : Beauty & Personal Care Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included GHK Cu Injectable Team Wellcore Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level