Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Glutamylcysteine SynthetaseGlutathione Synthetase: Domain Structure and Identification of Residues Important in Substrate and Glutathione Binding Biochemistry Glutathione: What It Is, Why You Need It, How You Can Increase It The Amino Company Kokumi! If you want a whole picture on umami, there's the core concept of glutamate, then a second level of umami boosting from ribonucleotides like IMP. There's a third layer that's not Catabolism of extracellular glutathione supplies cysteine to support tumours Nature Glutathione Gsh Antioxidant Plants Animals Fungi Stock Illustration 1320541694 Shutterstock