GHK-CU
GHK-Cu is a naturally occurring copper-binding tripeptide complex found in human plasma and tissues. It is widely studied in skin and connective tissue research due to its affinity for copper ions and its association with extracellular matrix signalling environments relevant to tissue remodelling. Research on GHK-Cu commonly evaluates collagen and elastin-related signalling, fibroblast activity, and modulation of oxidative stress and inflammatory markers in skin models. Investigators also study how copper-peptide complexes influence gene expression patterns related to matrix maintenance and barrier function, with emphasis on pathway-level effects rather than clinical claims.