Copper-binding tripeptides are the most studied peptide class for skin remodeling and collagen research. Here is what the published literature found for each.
GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) studied for its role in skin remodeling, wound healing, and antioxidant activity, largely through effects on gene expression tied to collagen and elastin production.
AHK-Cu is a synthetic copper-binding tripeptide related to the better-known compound GHK-Cu. Copper is an essential cofactor for collagen cross-linking and wound-healing enzymes, and AHK-Cu was specifically engineered to target hair follicle growth rather than acting as a general tissue-repair signal.
This guide summarizes published research findings only — it is not medical advice, a dosing recommendation, or a claim about safety or effectiveness for human use. For Research Purposes Only, Not For Human Consumption.