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GHK-Cu/Epitalon: Skin + Cellular Renewal | PeRx Variants:Bloom B2G1 (3pcs) Smoother Skin https://i.etsystatic.com/65429286/r/il/2082d1/7944472723/il_fullxfull.7944472723_xbq6.jpg GHK-Cu (glycyl-L-histidyl-L-lysine:copper(II)) is a naturally occurring copper-binding tripeptide studied for its role in molecular signaling, matrix remodeling, and pathway dynamics

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