Is Magnesium Stearate Halal?

The verdictIt depends

Magnesium stearate (E470b) is halal or not depending on its source. It is made from stearic acid, which can come from vegetable oils (halal) or animal fat including tallow (halal only if zabiha, haram if pork). The label almost never states which, so unspecified magnesium stearate — very common in tablets and supplements — is best treated as doubtful unless it is stated vegetable-derived or halal-certified.

Last checked: June 28, 20261 source checked

HalalVouch presents evidence and does not issue religious rulings — you decide.

The short version

Magnesium stearate is a flow agent in tablets and supplements, made from stearic acid — which can be plant or animal-derived. So it depends on the source, and the label usually does not say.

The source question

Stearic acid, the basis of magnesium stearate, can come from:

Vegetable oils (palm, coconut) → halal
Animal tallow → halal only if the animal was zabiha
Pork fat → haram

Because the label almost never names the source, unspecified magnesium stearate is best treated as doubtful.

How to check

"Vegetable magnesium stearate" or a vegan/halal mark → halal.
Unspecified E470b in a tablet or supplement → doubtful; ask the maker or choose a certified product.

Common questions