Lots of cites in the short wikipedia article: https://en.wikipedia.org/wiki/Monosodium_glutamate https://en.wikipedia.org/wiki/Monosodium_glutamate To paraphras

Lots of cites in the short wikipedia article: https://en.wikipedia.org/wiki/Monosodium_glutamate https://en.wikipedia.org/wiki/Monosodium_glutamate To paraphrase the wiki, it still won't stop US ad-copy writers from touting "MSG Free!", even for products that already contain glutamic acid.