L Glutathione vs. Glutathione: What's the Difference? Invigor Medical Glutathione: a naturally occurring tripeptide for functional metal nanomaterials Chemical Science (RSC Publishing) DOI:10.1039 D4SC08599J Catabolism of extracellular glutathione supplies cysteine to support tumours Nature 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