

It makes food taste good without bringing the feeling of satiety. People can eat a whole bag of Doritos without feeling full, despite consuming a full day’s worth of calories.
The taste vs satiety hacking of modern fast food is a reasonable hypothesis on the cause of the obesity crisis.
It’s not just MSG though. It’s also disodium inosinate and disodium guanylate which work together with MSG to produce the most profound umami response.
I guess not many people remember that Microsoft was convicted of antitrust violations against Netscape (which effectively destroyed that command).