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A prior check list should be to have realistic approach and expectation

doi: 10.3389/fphar.2025.1540255 82 GuDYiHJiangKFakharSHShiJHeYet al

The injectable route makes more sense for wound healing and skin remodeling protocols where systemic distribution is the goal

Oral glutathione may raise glutathione markers in some studies, especially with longer use or liposomal forms, but benefits for specific conditions remain uncertain

The compound has been shown to restore decorin expression, which may help explain why GHK-Cu-treated skin often looks smoother even when collagen content changes are modest

Abd E, Gomes J, Sales CC, Yousef S, Forouz F, Telaprolu KC, et al