glutathione and homocysteine A simultaneous liquid chromatography/mass spectrometric assay of glutathione, cysteine, their disulfides in biological samples Homocysteine, Nutrition, and Gut Microbiota:
Description
Many people find that taking glutathione on an empty stomach, about 15-20 minutes before a meal, yields the best results

doi: 10.1038/s41392-020-00441-y

Meals that used to cause issues were suddenly fine

Furthermore, researchers often deplete endogenous GSH levels in cell models, using inhibitors of its synthesis like buthionine sulfoximine (BSO), to investigate the role of the glutathione system in mediating the cytotoxicity of specific drugs or environmental toxins
