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 GHK Cu Peptide Regenerative & Cosmetic Research GHK CU REGENERATION SERUM Hyaluronic Acid 2% + GHK Cu (Serum) G Lab Peptides CHN GHK CU: CHN C PHC HI MNH M V CHNG LO HA NG DI! Lng Vin