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GHK-Cu and Skin: What the Science Supports (2026)

This discovery led to the proposed “floodgate model” in redox signaling, wherein a burst of H 2 O 2 could generate a Cys-sulfinic acid on PRX in a rapid two-step process, which would transiently inactivate the PRX peroxidase activity and allow H 2 O 2 to accumulate locally and oxidize Cys residues on other proteins as a signaling molecule (140)

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Most remarkably, ARA-290 initiated measurable regrowth of small nerve fibers in the cornea, providing direct evidence of nerve regeneration in humans