AHK-Cu

AHK-Cu is a short chain of three amino acids (alanine, histidine, and lysine) that carries a copper ion. Copper-binding peptides like this one are studied because copper is an essential trace metal involved in tissue repair, collagen formation, and the activity of several enzymes. By packaging copper into a small, skin-compatible peptide, the idea is to deliver the metal to cells in a controlled way.

Most of the interest in AHK-Cu comes from skin and hair research, where copper peptides have been explored as ingredients that may support the cells and structural proteins of the skin and hair follicle. In laboratory and animal studies, copper tripeptides have been reported to influence cells that build connective tissue and to interact with growth-related signaling. It is often grouped conceptually with the better-known copper peptide GHK-Cu.

The honest takeaway is that high-quality human evidence for AHK-Cu is sparse. Much of what is claimed rests on cell-culture work, animal models, and cosmetic formulation studies rather than rigorous clinical trials. It is not an approved drug, and its biological effects in people remain largely uncharacterized.