Glutathione is a critical soldier in our line of defense. We even have mechanisms that recycle and reuse it. But what happens when our toxic burden becomes too high? Our genetic detoxification Catabolism of extracellular glutathione supplies cysteine to support tumours Nature Glutathione, what is it? Do I need it? Johnson Chiropractic, Inc. Beyond Sugar: What Cancer Cells Need to Grow Memorial Sloan Kettering Cancer Center Glutathione: Benefits and Supplements