GHK-Cu

GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper Complex) is an endogenous human tripeptide with high affinity for copper ions. First isolated from human plasma in 1973. Plasma levels decline significantly with age — from ~200 ng/mL at age 20 to ~80 ng/mL at age 60. Research suggests benefits in skin regeneration, wound healing, collagen stimulation, and anti-aging. Molecular formula: C14H24CuN6O4. CAS: 89030-95-5.