glutathione synthesis is linked to one-carbon metabolism and one‐carbon pathways. Pathways of Serine, glycine and one-carbon units:

In this study, glutamine flux was directed toward the generation of R-2-HG in IDH1/2 mutant cells, and the kinetics of R-2-HG formation were proportionally of the same order of magnitude as those of glutamate or -KG formation via glutaminolysis

40 The German pharmaceutical company Bayer (yes, the aspirin people) started commercial production of the compound in 1898 and marketed it under the name, Heroin. 40 Heroin was considered to be a wonder drug and the medical profession enthusiastically received it

Additionally, although true allergies to glycine are exceedingly rare, any prior hypersensitivity reaction to glycine or to components of the formulation would contraindicate its use

Understanding the Warburg effect: the metabolic requirements of cell proliferation

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the bad news is many people dont produce enough of it