Monosodium glutamate (MSG) is the sodium salt of glutamic acid, a naturally occurring amino acid found in foods like tomatoes, cheese, and mushrooms. Discovered in the early 20th century, MSG became popular as a food additive for its ability to amplify the savory umami flavor in dishes. This white, nearly odorless crystalline powder enhances flavors without contributing a taste of its own.
In cooking, MSG is used to enrich the overall flavor profile of various dishes. It is particularly prominent in Asian cuisine, where it enhances the umami notes in stir-fries, soups, and sauces. Its versatility also makes it a valuable ingredient in vegetarian and vegan recipes, where it replicates the depth of flavor typically associated with meat-based dishes.