You might also know it as Monosodium Glutamate, or else labeled as hydrolyzed vegetable protein and/or disguised as plant protein extract, yeast extract, corn oil, calcium caseinate, hydrolyzed oat flour, and sodium caseinate. MSG is also present in food additives such as malt extract, "natural" flavoring, and certain name brand broths.
In general, MSG is present in most processed foods as a cheap flavor enhancer. MSG contains excitotxins, which are basically chemicals that overstimulate your nerve cells to the point of killing them. So if you consume this toxin in high amounts, you are putting yourself at risk for all sorts of neurodegenerative diseases and obesity . Similarly, children exposed to MSG are at risk for endocrine problems later in life.
The food industry is constantly coming up with new names to conceal MSG. If you wish to learn more, there are lots of websites with a wealth of information. Here are a few I like ...
See full list of MSG aliases here.
Types of products that contain MSG.
What to avoid.
(cartoon via truthinlabeling.org)