Can Reduced Glutathione Support Detoxification and Energy in Long COVID and ME CFS? RTHM Glutathione for Food and Health Applications with Emphasis on Extraction, Identification, and Quantification Methods: A Review Master Antioxidant Therapy Glutathione IV 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.