how glutathione acts as a reducing agent - an overview What Is Reduced Glutathione? Benefits,

10.1038/224117a0 Nature

doi: 10.3201/eid2502.181011 42 ScottJTSesayFRMassaquoiTAIdrissBRSahrFSempleMG

RNA-Seq analysis of salinity stressresponsive transcriptome in the liver of spotted sea bass (Lateolabrax maculatus)

L-cysteine supplementation also helps to prevent the downregulation of vitamin D regulatory genes by way of increasing GSH N-Acetylcysteine (NAC) is another form of cysteine that is considered less toxic, less susceptible to oxidation (and dimerization) and is more soluble in water, making it a better source of cysteine than parenteral administration of cysteine itself. GSH is necessary to help protect our cells from damage due to oxidative stress, mercury and other toxic metals, alcohol, persistent organic pollutants, and much more

In healthy cells, there is a balance between ROS and antioxidant defenses