GHK (Glycyl-L-Histidyl-L-Lysine) is a naturally occurring tripeptide that, with and without copper binding, affects a large number of genes related to the body's response to stress and injury. Research has demonstrated its involvement in tissue remodeling, antioxidant defense, anti-inflammatory signaling, pain reduction, blood vessel growth, nerve outgrowth, and anti-cancer activity. GHK has gained significant attention in anti-aging research for its ability to promote collagen synthesis, improve skin elasticity, and support overall tissue regeneration.