Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience GHK Cu Scalp Solution Empower Pharmacy This compound has been studied for over 50 years., Most people discovered it last year on social media., , In 1973, Dr. Loren Pickart identified GHK Cu, while studying why young blood could restore Amazon.com: Copper Peptide Hair Serum with Copper Tripeptide 1 Dual Peptide Scalp Treatment plus Licorice Root Extract : Beauty & Personal Care