Other substances that contain excitotoxins by International Food Information Council (ific) and the U.S. Food and Drug Administration (fda) study reports information about the level of danger to health. MSG as an ingredient in food.But many experts say the penalty if the body has high levels of glutamate. The attention of the johns hopkins university medical studies indicated that MSG can cause many diseases.2 levels of short-term side effects may cause a slight allergic reaction. For example, a Chinese restaurant syndrome or long-term side effects that occur. For example, vision loss or blindness disease,.Anemia, dermatitis, asthma, paralysis around the mouth. Disease, Alzheimer's, mental retardation, slow growth or cause sterility and death.