15 Glutathione Benefits: How to Improve Your Mind & Body Assessment of red blood cell glutathione status in insulin resistance Glutathione is the body's primary internal antioxidant, made using the amino acid cysteine, and it helps protect cells from oxidative stress. Beyond detoxification, research shows glutathione is involved in thyroid hormone metabolism, Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Glutathione Benefits for Gut Health Nikki Yelton RD What is Glutathione & why is it so important ? OptimOZ.com.au