10.3389/fendo.2019.00080 39 DeFronzoR
(3) GHK-Cu is posited to function as a repair-associated signal that may engage fibroblasts, immune cells, enzymes, ion channels, and cell-surface receptors, with reported downstream potential over gene expression
Again, note that none of them are exclusive of each other
Quelle: Parazzini, F., Vigan, P., Candiani, M., & Fedele, L
25,26 Furthermore, a polymorphism of the DHFR enzyme resulting in a 19bp deletion within the site of a key regulatory sequence has been theorized to exhibit negative effects on the expression and activity of this enzyme
It's not a direct fat burner in the traditional sense, which is an important distinction, but rather a potent inhibitor of nicotinamide N-methyltransferase (NNMT)