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GHK-Cu is widely used in cosmetic formulations and studied extensively in scientific literature, though regulatory status varies by country and use case (cosmetic versus injectable)
NNMT (nicotinamide N-methyltransferase) catalyses the methylation of nicotinamide using S-adenosylmethionine (SAM) as the methyl donor, producing 1-methylnicotinamide (1-MNA) and S-adenosylhomocysteine
Oxidative stress can cause damage to DNA, proteins and lipids
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