E621 — Monosodium glutamate (MSG)

Needs verification

E621 (Monosodium glutamate (MSG)) needs verification. The savoury flavour enhancer behind crisps, stock cubes and instant noodles.

Why it needs verification

Commercial MSG is grown by fermentation on a plant substrate, and that substance itself is halal. What the label leaves out is the substrate, so it stays a question until a halal mark or the manufacturer settles it.

Where you meet it

Crisps, instant noodles, stock cubes, sauces, ready meals.

What to do in the shop

Look for a product that names the source, says plant-based or vegan, or carries a halal certificate. If nothing on the packet settles it, the manufacturer can tell you, and their answer is the only thing that turns E621 from a question into an answer.

A status here describes the additive in general — a specific product can be different. The same number can be made from plant or animal material depending on the manufacturer, and the label does not say which.

Questions people ask

Is E621 halal?

E621 (Monosodium glutamate (MSG)) needs verification. Commercial MSG is grown by fermentation on a plant substrate, and that substance itself is halal. What the label leaves out is the substrate, so it stays a question until a halal mark or the manufacturer settles it.

How do I know if the E621 in a product is halal?

Only the manufacturer can tell you which source they used, unless the packet says plant-based, vegan, or carries a halal certificate.

Related additives

See all E-numbers →

Check a product, not just a number

An additive's status describes the additive in general. What matters is the whole ingredient list on the packet in your hand.

This is information, not a fatwa. These statuses combine published scholarly positions with ingredient analysis, and they can be incomplete or out of date. For anything that matters, confirm with the manufacturer and with a qualified authority.