Is MSG actually bad for you, or just badly judged?
The seasoning blamed for headaches is the same flavor molecule in a ripe tomato.
MSG is sodium plus glutamate, an amino acid your body handles every day. The FDA lists added MSG as generally recognized as safe, and a JECFA review set no numeric daily limit because human studies failed to confirm 'Chinese restaurant syndrome'. The panic from a 1968 letter was never reproduced in controlled double-blind tests. Reviewers noted that a few sensitive people may feel brief, mild effects from very large doses (about 3 g or more) taken without food, but a normal serving has well under half a gram.
The umami punch in a bowl of pho or a sprinkle of bot ngot is the same glutamate that makes a tomato or aged parmesan taste savory.
MSG is safe in normal amounts; the old scare was a myth, not science.
Knowing the evidence stops you from paying more or eating worse just to dodge a harmless ingredient.
MSG = the tomato's flavor in a shaker. Same molecule, no monster.
Learn the idea and practice English at the same time.