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 Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Non Greasy Hair Regrowth Serum and Spray, Whats in it ? , GHK CU peptide , promotes hair growth, increases hair thickness, and reduces thinning by stimulating follicle activity, enhancing scalp Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience