Nutrition. Healthy Eating. MSG (monosodium glutamate) is a form of the naturally occurring amino acid glutamate, and is used as a food additive to intensify the taste of food. This flavor enhancer, originally extracted from seaweeds and used in Asian cuisines, has now become a common find in many food products.omplete elimination of MSG from your diet is very difficult to do. It requires careful and detailed examination of all of your food labels and more time dedicated to food preparation and cooking. However, considering the amount of damage MSG can do to your body, these inconveniences may be worth it.