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.
More about symptoms of Monosodium glutamate (MSG) adverse reaction: Other Possible Causes of these Symptoms. Click on any of the symptoms below to see a full list of other causes including diseases, medical conditions, toxins, drug interactions, or drug side effect causes of that symptom.