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The key takeaway is that GHK-CU produces measurable, documented improvements when used consistently at appropriate doses

Abstract Glutathione (GSH) is an endogenous tripeptide (Glu-Cys-Gly) and the most abundant endogenous antioxidant

The same study found copper peptide GHK-Cu to be non-toxic and non-irritating

Fast Answer GHK-Cu peptide is a copper-bound form of the tripeptide glycyl-L-histidyl-L-lysine that is studied mainly for skin biology, collagen synthesis, wound healing, and related dermatology uses [1], [2]

However, results depend on consistency, bioavailability, and supportive nutrients, not just milligrams alone