GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics 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 Did you know that GHK Cu is a natural naturally occurring copper complex in the body that decreases with age? Benefits of GHK Cu Reverses thinning tightens loose skin Improves firmness, elasticity, Oklahoma GHK Cu is a naturally occurring peptide that is gaining attention in the wellness space. It is currently being studied for its role in supporting skin health, hair health, recovery, and GHKCu Copper Peptide Therapy Skin & Healing Regeneration