GHK-Cu vs AHK-Cu: Two Copper Peptides, Different Niches

GHK-Cu and AHK-Cu are both copper-binding peptides, but they've been researched for different niches. GHK-Cu is the broad tissue-remodeler with strong skin evidence; AHK-Cu is the hair-follicle-focused cousin, studied for delivering copper to follicle cells to extend the anagen growth phase and support keratinocyte proliferation.

The shared mechanism is copper delivery — copper is a cofactor for enzymes like lysyl oxidase that follicle metabolism depends on. The difference is target specificity: GHK-Cu's data is skin-deep (literally), AHK-Cu's is follicular. Members discuss both, and the thread below covers what the hair evidence does and doesn't show compared to the more robust skin data.