For those who are tolerant of msg, it offers zero nutritional benefit. Banning it would help millions of migraine sufferers and harm no consumer.
You cannot ban a natural, ubiquitous amino acid, any more than you can ban salt. You can try to ban adding MSG to foods, but sooner or later, you would also have to ban yeast extract, soy sauce, tomatoes, hard cheeses, and so on, at which point we would definitely run into trouble.Reaearch has consistently failed to verify the existence of MSG sensitivity; while it may exist in some small number of cases, its mostly a misattributed cause.
Also, its not true that it would have no consumer harm; its a lower-sodium palatability enhancer than table salt, and removing it from the set of options would have consumer harms.
> In fact, it could benefit the obesity epidemic by removing that overeating urge msg creates.
That's an effect of sugar, salt, and fat (separately, but even more in the right combination); MSG is mostly irrelevant to it (except that banning MSG probably means more salt.)
that surely contributes to obesity then, if we are ignoring our fullness signals and regularly overeating because msg is nearly ever-present and suppressing our key mechanism