The United States, the world's largest economy, accounts for approximately 25 percent of Nominal world GDP, and the seven largest economies (amalgamating the European Union economies as one) account for 75 percent of the total.
For this reason, when MSG is added to food, the FDA requires that it be listed on the label. MSG has been used as a food additive for decades. Over the years, the FDA has received many anecdotal reports of adverse reactions to foods containing MSG. These reactions â known as MSG symptom complex â include: Headache.
The Food and Drug Administration (FDA) has classified MSG as a food ingredient that's generally recognized as safe, but its use remains controversial. For this reason, when MSG is added to food, the FDA requires that it be listed on the label.hese reactions â known as MSG symptom complex â include: 1  Headache. 2  Flushing. 3  Sweating. 4  Facial pressure or tightness. 5  Numbness, tingling or burning in the face, neck and other areas. 6  Rapid, fluttering heartbeats (heart palpitations). 7  Chest pain. 8  Nausea.