Did you know one single mast cell can release chemicals that affect your skin, gut, heart, brain, and immune system all at once? That's why MCAS can feel so overwhelming, the 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. Allergy Research Group Acetyl Glutathione 100 mg 60 Scored Tablets Professional Health Products Quality Health Products