GHK-Cu and Skin Biology: What the Research Actually Shows

GHK-Cu (Glycyl-L-histidyl-L-lysine copper complex) is one of the most studied cosmetic peptides, with research dating back to the 1970s. Unlike many cosmetic actives, it has a substantial body of peer-reviewed evidence.

Collagen Synthesis

In vitro studies have demonstrated GHK-Cu's ability to stimulate fibroblast proliferation and upregulate collagen synthesis. Research published in *Skin Pharmacology and Physiology* documented significant increases in collagen I and III production.

Antioxidant Activity

GHK-Cu acts as a superoxide dismutase (SOD) mimetic, reducing oxidative stress in skin models. This mechanism is relevant to photo-aging research and skin barrier function studies.

Wound Healing

Multiple studies across the 1980s–2000s demonstrated GHK-Cu's role in accelerating wound closure in animal models, attributed to its effects on angiogenesis and fibroblast migration.

Summary

GHK-Cu's research profile is unusually robust for a cosmetic peptide, making it a valuable compound for skin biology research programs.