GHK Cu is one of my personal favorites for a lot of reasons, but I can say without a doubt that it's use effectively stopped and reversed, my receiving hairline. However, there are 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 NEW GHK Cu , Now Available at Carrington Medical, Healthier Skin. Thicker Hair. Real Science. , Were excited to offer GHK Cu (copper peptide) in our treatments the latest in regenerative A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend