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 fact that you feel not symptoms when you eat MSG does NOT mean your system is not reacting. It simply means you FEEL nothing. MSG is often the cause of insomnia, but it may cause migraine headaches, Alzheimer's disease, temporary blindness, fainting, instant diarrhea, and many other reactions. MSG goes through the brain barrier, which is very rare with most agents and drugs.