Homonym: E621 (Additive)
E621, commonly known as monosodium glutamate (MSG), is a flavor enhancer often used in cooking. It is derived from glutamic acid, an amino acid found naturally in many foods, including tomatoes and cheese. MSG is popular in Asian cuisine and processed foods, as it enhances umami, one of the five basic tastes.
While MSG is generally recognized as safe by health authorities, some individuals report sensitivity to it, experiencing symptoms like headaches or nausea. Research continues to explore the effects of MSG on health, but it remains a widely used ingredient in the food industry.