Compound brief
Evidence brief. Not treatment advice or a safety clearance. Last evidence update: September 2026.
Histidine binds copper. The tripeptide is a tissue copper carrier, not elemental copper and not a free copper salt.
Forums sometimes treat the copper ion as a separate supplement. The mapped chemical is the complex.
GHK is released from extracellular matrix proteins such as SPARC fragments in tissue-remodeling literature. Copper coordination lets the peptide move copper into cells that need lysyl oxidase and related enzymes for collagen and elastin crosslinks.
Gene-expression papers describe shifts in repair, antioxidant, and matrix genes. Those are cell and tissue signals. They are not a human drug-interaction trial.
Forum themes are unverified. They do not outrank a study, and they are not a dose.
Local irritation · unverified
Copper-peptide discussions spend as much time on sting, blue tint, and skin use as on systemic repair. Those posts do not establish a drug interaction. They do show that people confuse the copper complex with copper supplements.
Theme summarized from public discussion. Not a quoted post, not a trial, and not a dose.