It is common knowledge that glutamic acid is an excitatory amino acid, causing brain damage when accumulate in substantial amounts (often referred to as “excess” by neuroscientists).
It is not common knowledge that excitotoxic glutamic acid is found in abundance in American food, pharmaceuticals, dietary supplements, enteral care products, protein powders, animal feed, and infant formula.
Check it out. Compare the names of ingredients that contain manufactured free glutamic acid found in the attached table to the names of ingredients listed on labels of processed foods.