GHK-Cu is a naturally occurring tripeptide found in human plasma that modulates over 4,000 genes involved in tissue repair, collagen synthesis, and antioxidant defense. One of the most studied peptides in dermatology, wound healing, and hair growth research.
How GHK-Cu Works: 5-Step Mechanism
GHK-Cu's effects stem from its role as a copper transport molecule and gene expression regulator — not a single receptor agonist. It chelates copper(II) ions, delivers them to enzymes requiring copper cofactors, and modulates transcription factor activity.
Research Applications
Topical GHK-Cu (1–3%) reduced fine lines, improved skin density, and increased collagen content in double-blind RCTs (Finkley et al., 2007; Leyden et al., 2004). Wound healing studies show accelerated re-epithelialization and reduced scar formation.
GHK-Cu vs BPC-157 vs Epithalon
How GHK-Cu compares to the two most commonly stacked anti-aging peptides — mechanism overlap, complementary applications, and evidence levels for each combination.