UpToDate: Allergic and asthmatic reactions to food additives. uptodate.com/contents/allergic-and-asthmatic-reactions-to-food-additives.
319
U.S. Food and Drug Administration: Questions and Answers on Monosodium glutamate (MSG). www.fda.gov/Food/IngredientsPackagingLabeling/FoodAdditivesIngredients/ucm328728.htm.