GHK-Cu (Copper Tripeptide-1) is a naturally occurring peptide found in human plasma, saliva, and urine that binds to copper ions. It’s best known in skincare and hair research for its role in tissue repair, collagen production, and skin regeneration. GHK-Cu has been shown in studies to support wound healing, improve skin elasticity and firmness, reduce inflammation, and help repair damage caused by aging or UV exposure. Because of these properties, it’s commonly used in anti-aging serums, creams, hair growth products, and post-procedure skincare. In cosmetic and research contexts, it’s valued for promoting healthier-looking skin and supporting the body’s natural repair processes rather than acting as a harsh active.