AHK-Cu
A copper-binding tripeptide closely related to GHK-Cu, studied mainly in cell models of skin and hair follicles.
Level of evidence
Preclinical — cell and animal studiesWhat it is
AHK (alanyl-L-histidyl-L-lysine) is a tripeptide that, like GHK, binds copper(II) ions. The two differ only by their first amino acid (alanine instead of glycine).
State of the research
Published work is mostly in vitro, on skin fibroblasts and hair-follicle cells. Controlled human trials have not been published.
Sources
Last reviewed: October 2026
Summaries of published scientific literature, for information and laboratory research only. They do not describe uses of our products, are not medical advice and do not imply that any compound is safe or effective in humans. Our products are not for human or animal consumption.