Frontiers Rumen protected methionine for dairy and beef cattle: current perspectives on methionine role, supplementation strategies, metabolism, health, and performance Glutathione system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis Cell Death & Disease The glutathione peroxidase Gpx4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity: Cell Reports 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