GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Skin Pharm Cosmetic Dermatology Clinics & Results Driven Skin Care A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing., Alright, I need to give you an updateit's been 12 weeks since I started using GHK peptides from Transcend, and Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK