Wikipedia Article About Monosodium glutamate on Wikipedia Monosodium glutamate is the sodium salt of glutamic acid. Glutamic acid, or glutamate, is one of the most common amino acids found in nature. Accent seasoning is also called MSG. It is not a favored seasoning or enhancer in the United States as many people are allergic to it. It is an optional seasoning and can very easily be left out of recipes.