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.
T he following foods contain MSG or its business end-the free amino acid glutamate-in amounts large enough to cause reactions in those sensitive to it.: 1  Taste No 5 Umami Paste MSG disguised as a substitute for MSG. 2  A travesty of misleading labeling and marketing.