GHK-Cu (Copper Peptide)

Collagen, hair, and wound healing at the cellular level

Glycyl-L-histidyl-L-lysine copper (GHK-Cu) administered topically at 1–2%, or via subcutaneous injection at 1–2mg per session. GHK-Cu is a naturally occurring human plasma peptide that declines with age — it stimulates collagen and glycosaminoglycan synthesis, promotes nerve regeneration, exerts powerful antioxidant effects, and has been shown in studies to reverse gene expression patterns associated with aging. Applied to the scalp, it activates hair follicle stem cells and has outperformed minoxidil in some models. One of the few peptides with substantial peer-reviewed evidence for both skin and hair applications. Available OTC as a topical; injectable form is a research chemical.