How oxidation and reduction are balanced within the ER lumen is not well-understood, and that understanding is confounded by the observations that neither ablation of both ERO1 isoforms (Zito, Chin, Blais, Harding, & Ron, 2010) nor apparent depletion of total ER glutathione (Tsunoda et al., 2014) appreciably impacts ER protein oxidation capacity or stress sensitivity except for specialized substrates
Besides, there are other supplemental metabolic processes like -oxidation of fatty acids, flavin oxidase pathway and the disproportionation of O 2 radicals for peroxisomal ROS production
10.1200/jco.2007.15.0375 145 SeetharamM.NormanA.AllredJ.KongJ.OpyrchalM.MaW
In one randomized, cross-over study, 20 participants were given oral glutathione (GSH), sublingual GSH, or NAC for three weeks
It may support skin brightening, improve complexion, and reduce the appearance of dark spots