Is E621 halal or haram?
MSG (monosodium glutamate) · Flavour enhancer
E621 (MSG (monosodium glutamate)) is generally classified as suspect (mashbooh). Made by bacterial fermentation of plant sugars or starch, with no animal ingredient in the MSG itself. The doubt is the process: the growth medium can involve animal-derived enzymes, as in Indonesia's 2001 Ajinomoto recall over a pork-derived enzyme. Halal-certified MSG is common; uncertified MSG is doubtful.
What is E621?
E621, listed on labels as MSG (monosodium glutamate), is a flavour enhancer that boosts the savoury (umami) taste. You'll most often find it in packaged and processed foods.
Is E621 halal? The verdict
E621 is mashbooh (doubtful). Made by bacterial fermentation of plant sugars or starch, with no animal ingredient in the MSG itself. The doubt is the process: the growth medium can involve animal-derived enzymes, as in Indonesia's 2001 Ajinomoto recall over a pork-derived enzyme. Halal-certified MSG is common; uncertified MSG is doubtful. Manufacturers aren't required to print the source on the label, so unless the pack states a plant/vegetable source or carries a recognised halal certification (HMC, JAKIM, MUI, IFANCA), the safest choice is to avoid it.
How to check E621 on a label
Scan the ingredient list for E621 and its other names. If it's present and the source isn't stated, treat the product as doubtful. A barcode or photo scan with Halal Food AI flags E621 automatically and tells you whether the product declares a halal source.
Other names & label terms to scan for
MSG (monosodium glutamate)MSGMonosodium glutamateFlavour enhancer 621INS 621E621
Bottom line
E621 is doubtful (mashbooh) — avoid unless the source is stated as halal or the product is halal-certified.
Stop guessing in the aisle
Halal Food AI flags E621 and every other suspect or not-halal additive automatically — just scan the barcode or snap the ingredient list. Plain-language verdicts, 25+ languages.
Prefer to check as you shop? The halal barcode scanner app scans a barcode or an ingredient photo and gives you the verdict on the spot.