Monosodium glutamate (MSG) is a commonly used "flavor enhancer," and so powerfully so that (arguably) you could spray it on roadkill and it would taste good. This omnipresent ingredient in modern mass market food takes advantage of our biologically hard-wired taste receptors, and makes it very hard to stop eating the foods "seasoned" with this ingredient.
Found everywhere as an additive in your food, new research has uncovered that this "flavor enhancer" is extremely toxic, causing a battery of adverse health effects within normal dietary ranges.
Not many people realize they have two brains. Yes, you read that right. And your second brain may have more to do with your health that you ever imagined.