Understanding Topical GHK Cu Peptide Benefits for Skin Rejuvenation in Maryland Preston's Pharmacy GHK Cu 10 g (10% Concentrate, 100,000 ppm) Lrak Technologies GHK CU ACETATE Topical Foam Compounded What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications? Defy 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