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cell GHK-Cu vs Adjacent Categories Format Topical GHK-Cu (cosmetic) What it is Copper Tripeptide-1 in serums and creams Evidence base Strongest human evidence (Leyden 2002, NEEL 2023) Typical use Daily anti-aging skincare Format Injectable GHK-Cu (research-use) What it is Reconstituted vial, SubQ injection Evidence base Mostly preclinical https://www.frontiersin.org/files/Articles/364396/xml-images/fpls-09-00751-g002.webp L-Glutathione reduced (Standard) Quantity:3

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