What to do if you have histamine intolerance? An expert gives advice Mast Cell Activation Syndrome (MCAS): A Functional Approach to Histamine Intolerance If you feel like your body is reacting to everything it's easy to start cutting more and more foods. But that's usually not the root issue. Histamine intolerance is often a capacity Histamine Intolerance Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification