MSG is a substance with fresh taste, the main component is monosodium glutamate, the trade name is monosodium glutamate, also known as monosodium glutamate. MSG is generally made from grain crops such as rice, corn, wheat and sweet potatoes, which are microbially fermented and then extracted and refined to obtain monosodium glutamate that meets national standards. Chicken essence is a compound condiment whose main components are MSG (40% content) and salt.