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It directly interferes with pigment production, encouraging the skin to produce lighter pigments instead of darker ones
Listed under the WADA 2026 Prohibited List
The existing research suggests GHK-Cu has a good safety profile for topical use
Pyo and colleagues showed that GHK-Cu at concentrations as low as 1 M promoted dermal papilla cell proliferation and beta-catenin signaling in mouse models
Abstractive Summary The copper peptides backlash currently spreading across skincare communities reflects a wider pattern in modern routines: potent active ingredients are increasingly available at consumer level without the layering knowledge that makes them safe
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