Copper Peptide Serum Anti Aging Face Oil for Glowing Skin 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 Amazon.com: GHK Cu Copper Peptide Supplement, Anti Aging & Hair Growth Support, Improves Skin Elasticity & Firmness, Thicker, Fuller Hair, Easy Absorption, Precisely Dosed, 90 Vegan Capsules : Health & Household A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health