Source:  Truth In Labeling.

Monosodium glutamate. MSG, is in so many foods we find it hard to keep track. In fact many food processors have taken to listing on their products:  "No MSG," "No MSG Added," or "No Added MSG," even though their products contain MSG.

Most offenders are small processors who are possibly being misguided by the FDA, the USDA, and/or consultants. Hain and Campbell's, both large companies, are among those who have been alerted to both the deception they are perpetrating and the illegality of what they are doing, yet continue with what the FDA has termed deceptive and misleading labeling.

If you want to find out if there is processed free glutamic acid (MSG) in a product, you must ask the manufacturer for information about "free glutamic acid."  Don't ask about "MSG."   Manufacturers find it convenient, when speaking to consumers, to tell them that there is no "MSG" in their product, meaning that there is no ingredient called "monosodium glutamate." 

Even if a manufacturer tells you there is no MSG in a product, there may be autolyzed yeast, hydrolyzed pea protein, carrageenan, sodium caseinate, enzymes, and a whole slew of other ingredients that contain or create processed free glutamic acid (MSG) during manufacture.