GHK-Cu (glycyl-L-histidyl-L-lysine) is a naturally occurring human copper-binding tripeptide that declines with age, acting as a potent regenerative, anti-inflammatory, and antioxidant agent. It accelerates wound healing, stimulates collagen/elastin production, improves skin elasticity, and promotes hair growth. Used in research for tissue repair and anti-aging, GHK-Cu modulates gene expression to promote cellular health.