Frontiers The versatile utility of cysteine as a target for cancer treatment Glutathione is such a critical soldier in our line of defense that our bodies make it themselves. We even have mechanisms that recycle and reuse it. But what happens when our toxic Dietary sulfur amino acid restriction improves glucose homeostasis through hepatic de novo serine synthesis bioRxiv Managing Competing Interests: Partitioning S between Glutathione and Protein Synthesis Plantae