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How It Works GHK-Cu creams and serums penetrate the epidermal and dermal layers, where they directly influence fibroblast activity, collagen production, and cellular repair mechanisms in the skin

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However, the lack of regulatory approval means comprehensive safety dataincluding potential effects on sexual functionhas not been systematically collected or evaluated

Some researchers have proposed that these properties may be relevant in the context of chronic inflammatory conditions, though human clinical evidence remains limited

doi: 10.3390/antiox9070624 260 SimsA