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Is E621 (MSG) halal or haram?
MSG is one of the most-feared additives among Muslim shoppers and one of the least justified fears. This is what is true.
E621 (monosodium glutamate) is normally halal. Modern MSG is made by bacterial fermentation of plant carbohydrates such as molasses, sugar cane or starch, not from animal sources. Major certifiers including JAKIM and MUI certify MSG as halal. The historical concern was about a fermentation nutrient, not the MSG itself, and it was resolved in 2001.
How MSG is made
Monosodium glutamate is the sodium salt of glutamic acid, an amino acid found naturally in tomatoes, parmesan, mushrooms and seaweed. Industrially it is produced by bacterial fermentation: Corynebacterium glutamicum is grown on a carbohydrate medium of sugar cane molasses, sugar beet or tapioca starch, and excretes glutamic acid, which is then neutralised with sodium and crystallised.
The process is closer to how yoghurt or vinegar is made than to anything involving animals. The feedstock is plant. The organism is a bacterium.
Where the "MSG is pork" rumour comes from
This has a specific, traceable origin, and knowing it explains why the fear persists.
In 2001, in Indonesia, MUI withdrew halal certification from Ajinomoto after discovering that the company had switched to a bacterial growth medium called bactosoytone, produced using a porcine-derived enzyme. Note carefully: the enzyme was used to prepare the nutrient the bacteria fed on, not to make the MSG. No pork entered the final product. Even so, MUI ruled it unacceptable, the product was recalled, executives were arrested, and Ajinomoto reverted to a soy-based medium and regained certification.
That episode is now 25 years old and was resolved at the time. It nonetheless seeded a permanent belief that MSG contains pork. It does not.
Do halal certifiers approve MSG?
| Body | Position on E621 |
|---|---|
| JAKIM (Malaysia) | Halal-certifiable; certified MSG widely available |
| MUI (Indonesia) | Halal, subject to audit of the fermentation medium |
| Mainstream certifiers generally | Halal when produced by plant-substrate fermentation |
| Stricter caution lists | Occasionally Mushbooh, on medium-verification grounds |
The residual caution is not "MSG might be pork". It is "the fermentation medium should be verified", which is precisely what certification audits.
What to watch for in savoury products
MSG rarely travels alone. It is usually paired with ribonucleotide enhancers, and those are the genuine Mushbooh flags:
- E627 disodium guanylate. Can be from fish, yeast or meat
- E631 disodium inosinate. Can be from fish, meat or fermentation; from pork it would be haram
- E635 disodium ribonucleotides. A blend of E627 and E631, same question
If a crisp packet or instant noodle seasoning worries you, E631 is the code to look at, not E621. Also look at the flavouring: undeclared "natural flavouring" and meat extracts in savoury seasoning are a bigger real-world risk than the glutamate.
Names MSG appears under
- E621
- Monosodium glutamate / MSG
- Sodium glutamate
- Flavour enhancer (E621)
- Related salts: E620 glutamic acid, E622 monopotassium glutamate, E623 calcium diglutamate, E624 monoammonium glutamate, E625 magnesium diglutamate, all fermentation-derived and treated the same way
Note that yeast extract, hydrolysed vegetable protein and autolysed yeast deliver the same savoury effect through naturally occurring glutamates. They are not E621 and are usually halal, though hydrolysed proteins are worth checking for the hydrolysis method.
Reading a savoury seasoning label
Scan the barcode; E621 appears in the Found Additives list alongside every other code in the product. Because the app shows the full breakdown rather than a single verdict, you can see immediately whether a savoury product's flag comes from the glutamate (usually fine) or from an inosinate or an undeclared flavouring (worth investigating).
Frequently asked questions
Is MSG made from pork?
No. MSG is produced by fermenting plant carbohydrates such as molasses or starch with bacteria. The persistent belief that it contains pork traces to a 2001 Indonesian case in which a bacterial growth nutrient, not the MSG itself, was made using a porcine enzyme. That was resolved at the time and the production reverted to soy-based media.
Is E621 haram in Islam?
Mainstream halal certification bodies including JAKIM and MUI certify MSG as halal when produced by plant-substrate fermentation. Some stricter caution lists mark it Mushbooh pending verification of the fermentation medium, but no major body classifies it as haram.
What about E631 in the same product?
E631 disodium inosinate is a separate additive and a genuine Mushbooh case, because it can be derived from fish, meat or fermentation. It is very commonly used alongside E621 in savoury seasoning. If you are checking a crisp or instant noodle packet, E631 deserves more attention than E621.
Stop guessing in the supermarket aisle
Scan the barcode, get the verdict, see exactly which additive decided it. Free, no account, 13 languages.
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