Reddit asked questions. Here are answers. GHK Cu isn't newit's just not heavily marketed for hair (yet). Dr. Loren Pickart discovered it in the 70s. Decades of clinical research. Solid mechanism. We screwed 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 Took a huge leap : r HairTransplants Wholesale GHK Cu Copper Peptide Neck & Face Serum for your store Faire Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size