Radiant Skin and Health and Conroe Willis Family Medicine now have several different peptides to offer. Our peptide of the day is GHK Cu. GHK Cu acts as a signaling molecule that tells the 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 GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B