What does "No msg" mean?

[Contro]

I sometimes see at food places a sign saying "no msg", what does it mean exactly?

[Sean]

Msg is a food additive which I think is generally considered unhealthy

Monosodium glutamate is one of several forms of glutamic acid found in foods, in large part because glutamic acid is pervasive in nature, being an amino acid. Glutamic acid and its salts can also be present in a wide variety of other additives, including hydrolyzed vegetable proteins, autolyzed yeast, hydrolyzed yeast, yeast extract, soy extracts, and protein isolate, any one of which may appear as "spices" or "natural flavorings." The food additives disodium inosinate and disodium guanylate are usually used along with monosodium glutamate-containing ingredients, and provide a likely indicator of the presence of monosodium glutamate in a product. For this reason, the FDA considers labels such as "No MSG" or "No Added MSG" to be misleading if the food contains ingredients that are sources of free glutamate, such as hydrolyzed protein.
In 1993, the FDA proposed adding the phrase "(contains glutamate)" to the common or usual names of certain protein hydrolysates that contain substantial amounts of glutamate.
In the 2004 version of his book, On Food and Cooking, food scientist Harold McGee states that "[after many studies], toxicologists have concluded that MSG is a harmless ingredient for most people, even in large amounts."

Monosodium glutamate - Wikipedia, the free encyclopedia

[Contro]

ok thanks