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You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture

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Topical Copper Peptides Affects surface layers of skin only Limited penetration through skin barrier Localized effect only where applied Good for maintenance, not transformation No systemic anti-aging benefit Available over-the-counter Injectable GHK-Cu Full systemic delivery to all tissues Reaches dermis, follicles, and healing sites Whole-body anti-aging effect More potent collagen stimulation Gene expression modulation (4,000+ genes) Requires medical prescription They are not mutually exclusive

NNMT uses up nicotinamide by tagging it with a methyl group (a process called methylation) and sending it out as waste