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 research concluded that MSG can cause the following symptoms: 1  burning sensation in the back of the neck, forearms and chest. 2  numbness in the back of the neck, radiating to the arms and back. 3  tingling, warmth and weakness in the face, temples, upper back, neck and arms facial pressure or tightness. 4  chest pain. few websites argue that this claim is false and that the warning is a hoax, such as Break the Chain and Snoopes. However, reputable medical websites such as WebMD MedicineNet.com suggest that consumers have reason to be weary about instant noodles.