Glutathione Complex Martin's Wellness Glutathione Cell Defense Integrative Therapeutics MTHFR and LC, CFS, POTS, MCAS, SIBO, EDS: Methylating the Alphabet Article (Preprint v1) by Patrick Chambers Qeios Mast Cell Activation Syndrome and Its Impact on the Lymphatics 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.