GHK-Cu, or glycyl-l-histidyl-l-lysine copper complex, is a naturally occurring peptide found in human serum that has garnered attention for its regenerative and protective properties. Researchers primarily study GHK-Cu for its potential roles in tissue repair, wound healing, and anti-aging applications. Key findings from various studies indicate that GHK-Cu promotes collagen synthesis, enhances nerve outgrowth, and exhibits anti-inflammatory effects, contributing to improved skin remodeling and cellular protection. Additionally, preclinical evidence suggests that GHK-Cu may influence multiple biochemical pathways involved in aging and tissue regeneration. Despite its promising attributes, current research is still in the early stages, with a notable lack of clinical trials validating its efficacy in human subjects.