GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia I took a serious turn last year towards peptide derived skincare. It changed my skin in all the best ways I didn't even imagine. When I started GHK Cu (copper peptide) injections 3 My Peptide Dosages Peptide Dosage Calculator & Guide Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with