This is according to an American study published in the "Journal of Pain Research"
The metabolites cyclic 3-hydroxy melatonin, N1-acetyl-N2-formyl-5-methoxykynuramine (AFMK), and N1-acetyl-5-methoxykynuramine (AMK), which can reduce free radicals, are formed when MLT reacts directly with free radicals, including hydroxyl (OH ), superoxide (O 2 ), and reactive nitrogen species, such as nitric oxide (NO ) The hypothesis that MLT has a multifunctional role as a mitochondrial antioxidant is supported by numerous investigations [116,117,118]
The FDA has restored GHK-Cu for non-injectable use to Category 1 of its 503A bulk drug substances list, reversing an April 22, 2026 removal that compounding pharmacies had been scrambling to interpret for the better part of a month
Gastroenterology 144 , 369380 (2013)
A., Geldhof, V., Pasut, A