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 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. Frontiers Mast Cell Activation in Brain Injury, Stress, and Post traumatic Stress Disorder and Alzheimer's Disease Pathogenesis Mast cells in autoimmune disease Nature Social Security Disability for Mast Cell Activation Syndrome The Bishop Law Firm Mast Cell Activation Syndrome: A Primer for the Gastroenterologist Digestive Diseases and Sciences Springer Nature Link