When NAC is absorbed, it's converted into the essential amino acid cysteine, which is one of the three building blocks of glutathione
10.1016/S1388-1981(00)00149-9 86 SmithT
So, if youre seeking a comprehensive solution for a luminous complexion, look no further than the synergistic benefits of vitamin C and glutathione
A 2010 study showed that copper peptide penetration through intact human skin reached only 0.5 to 2% of the applied dose under occlusion [14]
Int J Mol Sci 19(3):792 Al-Khayri JM, Mascarenhas R, Harish HM, Gowda Y, Lakshmaiah VV, Nagella P, Al-Mssallem MQ, Alessa FM, Almaghasla MI, Rezk AA(2023) Stilbenes, a versatile class of natural metabolites for inflammationan overview