# GHK-Cu FAQ: Skin, Hair, Neuroprotection, Genes, Safety, and Dosing

> GHK-Cu FAQ: 22 cited answers on copper-peptide skin and hair research, neuroprotection, the GHK vs GHK-Cu distinction, genes modulated, side effects, stability, and what the human-data record does and doesn't show.

The most-asked questions about the copper tripeptide — skin, hair, neuroprotection, genes, safety, and dosing — each answered directly, cited where the claim is quantitative, and honest where the data stops.

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A dried herbarium of the GHK-Cu copper-tripeptide literature, pressed plate by plate and traced to its paper — the place where the materia is catalogued and studied, never a clinic, a counter, or anything dispensed.