GHK-Cu (Copper Peptide) GHK-Cu is a naturally occurring copper-binding peptide that has been studied for its potential role in skin health, tissue repair and collagen-related processes. Research has explored GHK-Cu in areas including: * Supporting skin elasticity and firmness * Collagen and extracellular-matrix processes * Skin regeneration and repair * Antioxidant and anti-inflammatory pathways * Hair and scalp health