iv glutathione pubmed Systemic as a Skin-Whitening Agent in Adult Glutathione deficiency and heart failure:

Oxidant/antioxidant effects of chronic exposure to predator odor in prefrontal cortex, amygdala, and hypothalamus

doi:10.1016/j.jad.2010.12.019, PMID: 21277635 Maes M, Van de Vyvere J, Vandoolaeghe E, Bril T, Demedts P, Wauters A, Neels H (1996) Alterations in iron metabolism and the erythron in major depression: further evidence for a chronic inflammatory process

doi:10.1016/S0009-2797(97)00146-4 Anschau A, dos Santos LO, Alegre RM (2013) A cost effective fermentative production of glutathione by Saccharomyces cerevisiae with cane molasses and glycerol

By isolating and examining the fluid inside these tumors, researchers found abundant storage of glutathione, confirming that tumors are devouring it as a nutrient source