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. MTHFR and LC, CFS, POTS, MCAS, SIBO, EDS: Methylating the Alphabet Article (Preprint v1) by Patrick Chambers Qeios Can Liposomal Glutathione Support Detoxification and Energy in Long COVID and ME CFS? RTHM Mast Cell Activation Syndrome San Diego Naturopathic Doctor & IV Therapy AAAAI Mast Cell Disorders Committee Work Group Report: Mast cell activation syndrome (MCAS) diagnosis and management Journal of Allergy and Clinical Immunology