Is MSG bad for you?
Also listed as: INS 621, E621, flavour enhancer 621
Short answer
Food safety regulators consider MSG safe at normal intake. Its bigger practical issue is that it usually comes in salty, processed foods.
What it is
The sodium salt of glutamate, an amino acid found naturally in tomatoes, cheese and mushrooms. It adds a savoury (umami) taste.
Where you’ll see it
Instant noodles, seasoning mixes, chips, soups, sauces and restaurant food.
+ The good side
- Contains about a third of the sodium of table salt by weight, so it can help reduce total salt in a recipe
- Glutamate from MSG is handled by the body the same way as glutamate in food
− The other side
- Some people report headaches or flushing after large amounts, though studies have not confirmed a consistent effect
- Mostly found in highly salted, processed foods
- In India, foods with added MSG must state it isn’t recommended for infants under 12 months
Who should pay attention
People reducing sodium, parents of infants, and anyone who notices they react to it.
💡 What to do: Look at the total sodium per 100 g. That number matters more than whether MSG is present.
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Sodium on food labels
Most adults eat too much salt. A food with more than about 600 mg sodium (1.5 g salt) per 100 g is high, and the WHO recommends under 5 g salt a day in total.
Natural and nature-identical flavours
Flavourings are permitted and used in tiny amounts. ‘Nature-identical’ means made in a lab to match a natural flavour molecule. The bigger clue is that real fruit or spice may be only a small part of the product.
General food information, not medical advice. Exact limits and labelling rules vary by country. If you have a medical condition or allergy, follow your doctor’s or dietitian’s advice.