Mast cells are hypersensitive immune cells that release histamine and other inflammatory mediatorsoften in response to oxidative stress, environmental toxins, and immune imbalance. Many patients with MCAS have low levels of glutathione. Effects of cancer induced cachexia and administration of l glutathione on the intestinal mucosa in rat Amino Acids Springer Nature Link EMF Sensitivity: Causes, Genes, What Helps Seeking Health Mast cells are hypersensitive immune cells that release histamine and other inflammatory mediatorsoften in response to oxidative stress, environmental toxins, and immune imbalance. Many patients with MCAS have low levels of glutathione. Novel insights on the biology and immunologic effects of histamine: A road map for allergists and mast cell biologists Journal of Allergy and Clinical Immunology