Benefits
AHK-Cu (alanyl-histidyl-lysine-copper) is a copper tripeptide, structurally related to GHK-Cu (see that page for the broader copper-peptide mechanism and its own evidence caveats).
Human tissue study (ex vivo human hair follicles + cultured human dermal papilla cells): AHK-Cu at 10⁻¹²-10⁻⁹M stimulated elongation of human hair follicles and proliferation of dermal papilla cells, while reducing their apoptosis (programmed cell death). Pyo et al., Arch Pharm Res, 2007 This is real human-tissue laboratory data (ex vivo/in vitro) — not a living-human clinical trial, an important distinction from an actual RCT.
What's the actual difference between AHK-Cu and GHK-Cu?+
Just one amino acid, but it changes the personality of the peptide. AHK-Cu swaps glycine for alanine at the start of the sequence, making it a bit bulkier and stiffer — and unlike GHK-Cu, which occurs naturally in your body, AHK-Cu is entirely lab-made.
Is it basically a hair-focused version of GHK-Cu?+
That's the intent behind it. GHK-Cu is the broad, well-established regenerator — skin, wound healing, general anti-inflammatory signaling. AHK-Cu was specifically designed to work locally at the scalp and hair follicle, a narrower target than GHK-Cu's wide reach.
Does it have as much research behind it as GHK-Cu?+
No, worth being upfront about. GHK-Cu has decades of published research across skin, wound healing, inflammation, and tissue remodeling. AHK-Cu's body of research is meaningfully smaller, and most of what exists is still preclinical.
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