
Monosodium glutamate, also known as sodium glutamate and MSG, is considered a flavour enhancing ingredient used to enhance the natural flavour of various foods. Although the Food and Drug Administration (FDA) has classified MSG as a food ingredient that is "generally recognized as safe," the use of MSG remains controversial.
The safety of MSG has been reviewed by regulatory authorities and scientists worldwide. However, some people may have short-term reactions to MSG. These reactions - known as MSG symptom complex - may include: Headache (sometimes called MSG headache), sweating, sense of facial pressure or tightness, chest pain, nausea, chest pain or weakness.
Symptoms are usually mild and don't require treatment. They generally appears about 20 minutes after consumption and disappears about two hours later. Such reactions have generally been reported to be temporary and not associated with severe adverse health effects. People sensitive enough to be affected are advised to avoid the use of this substance.