Glutamine drives glutathione synthesis and contributes to radiation sensitivity of A549 and H460 lung cancer cell lines ScienceDirect Ingredient Spotlight: Glutathione Amandean Glutathione, our master antioxidant, is built from cysteine, glycine, and glutamine. Low levels of these amino acids on testing may signal impaired production. Cysteine is key, with glycine close Cyto Glutamine High Dose Amino Acid (Formerly L Glutamine Powder) Fullscript Critical Roles of the CysteineGlutathione Axis in the Production of Glutamyl Peptides in the Nervous System