Monosodium glutamate (MSG)

Also known as: MSG, E621, monosodium L-glutamate

Moderate concernunder our published method

By NordicScan Evidence Engine · generated from structured evidence records · source spans verified by automated gates · Reviewed 2026-07-08 · Evidence snapshot geo-wave1-evidence-snapshot-2026-07-08 · Scoring engine det_v3 · how we score.

What it is

Monosodium glutamate is the sodium salt of glutamic acid, used to add savoury flavour in snacks, soups, sauces and prepared meals.

Why people ask

People ask because MSG has persistent public concern, while the current regulatory signal is mainly label disclosure and GRAS status in the US.

What our method flags — by use

Food · US

In US food, our method rates MSG as moderate-concern: it is label-visible and widely searched, but the source-backed regulatory cell is a disclosure/status signal.

The US FDA listed by guidance that foods containing added MSG must list it in the ingredient panel as monosodium glutamate.

Authority / source	Finding (our paraphrase)	Evidence tier	Date	Link
US FDA	The US FDA listed by guidance that foods containing added MSG must list it in the ingredient panel as monosodium glutamate.	authority_regulatory	2018-01-04	source
US FDA	FDA listed by Q&A that added MSG must appear in the ingredient panel as monosodium glutamate.	authority_regulatory / --	2018-01-04	source

Evidence coverage for this use: Fair (computed from source count × authority tier × recency; signals depth, does not change the concern band).

How this moves a product’s score

On a product score, MSG contributes a moderate concern signal because it is a label-visible additive with high shopper demand; this page does not add a stronger hazard classification.

Nordic Scan provides ingredient information and a concern score under our published method, for general consumer research. It is not medical advice and not a medical device, and does not diagnose, treat, cure, or prevent any disease, or determine the safety of any product. Decide for yourself.

Common questions

Does the page say MSG has a special hazard classification?: No. The evidence cell reports FDA labelling/status facts and keeps the verdict at moderate concern.

This is what Monosodium glutamate (MSG) is. What’s in the products you buy? Scan a label and see the concern signals our method flags. Get the app.

Reviewed 2026-07-08 · Evidence snapshot geo-wave1-evidence-snapshot-2026-07-08 · Scoring engine det_v3 · Sources checked 2026-07-08 · See how we score.