# GHK-Cu FAQ: Mechanism, Collagen, Hair, Skin, and Safety Answered

> GHK-Cu questions answered from the literature: how the copper peptide works, GHK vs GHK-Cu, collagen and hair data, retinol comparison, side effects, and gene expression. Each answer cited.

Twenty-two questions about the copper tripeptide — definitional, mechanistic, and skeptical — answered directly and sourced to the original paper where the claim is quantitative.

## Definitions and mechanism



## Skin, collagen, and anti-aging



## Hair growth



## Safety, formulation, and the gaps



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A feature dossier on the copper tripeptide GHK-Cu, set like a magazine and sourced like a citation index — every figure attributed, every gap printed in plain sight, and nothing here clinical, prescribed, or for sale.