Monosodium glutamate (MSG), a flavor enhancer commonly added to many fast foods, canned & processed foods, salad dressings, bouillon cubes, seasonings, etc., is an excitotoxin which can over-stimulate the heart, be a trigger for migraine headaches, and has been associated with facial pressure or tightness and paresthesias such as burning, tingling, or numbness. Some people react to it more strongly than others. It is definitely wise to avoid if you are a migraine sufferer.
