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During this period nicotinamide N-methyltransferase (NNMT) was identified as a key enzyme involved in cellular methylation pathways and metabolic regulation
By the Premium UK Peptides Research Team Updated July 2026 8 min read GHK-Cu is a naturally occurring copper-binding tripeptide glycine, histidine, and lysine, bound to a copper (II) ion that the body already produces and circulates in plasma, saliva, and urine
Dayton TL, Jacks T, Vander Heiden MG
doi:10.1002/14651858.cd004326
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