What are the harmful effects of monosodium glutamate?
So if large amounts of glutamte from MSG get into the brain, which it will in the areas that have no blood brain barrier, or in areas that have a defective blood brain barrier, then it can overstimulate brain cells. It has also been shown that when the blood glutamate level is high for a prolonged period that it will even seep past a supposedly intact blood brain barrier.