GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin repair, and Wholesale GHK Cu Copper Peptide Hair & Scalp Serum for your store Faire GHK Cu 50mg Copper Peptide Research Grade Midwest Peptide GHK Cu Peptide Therapy Brea, CA Orange County GHK CU 50MG Lux synth aminos