The lack of efficacy of inhaled GSH in patients with cystic fibrosis could be explained by the high concentrations of the GSH-degrading enzyme -glutamyltransferase present in lung fluids of those patients (116123), and then, the use of precursors of GSH synthesis like NAC and cystine could be more effective in the synthesis of GSH (124)
10.4103/0253-7613.115015 179 WangT.JianZ.BaskysA.YangJ.LiJ.GuoH.et al (2020a)
It binds to drug metabolites, alcohol byproducts (acetaldehyde), heavy metals, environmental pollutants, and other toxins through a process called glutathione conjugation
Trends Genet 35:412422 Hanzlikova H, Gittens W, Krejcikova K, Zeng ZH, Caldecott KW (2017) Overlapping roles for PARP1 and PARP2 in the recruitment of endogenous XRCC1 and PNKP into oxidized chromatin
Additionally, research demonstrates significant improvements in skin brightness and reduction of melanin indices following oral glutathione supplementation [3]
For example, senescent cells upregulate BCL2 family proteins such as BCL-XL, BCL-W 24 or MCL-1 25 to prevent intrinsic apoptosis