Also known as: Alanine-Histidine-Lysine copper peptide

Synthetic copper tripeptide (Ala-His-Lys-Cu) marketed in hair and skin products. One published lab study (Pyo 2007); zero human trials. Often confused with GHK-Cu, which has a vastly larger evidence base.

📖 Read the full AHK-Cu research overview →

Evidence Tier: Tier 4 — Preclinical Only · Peptidings Verdict: Thin Ice