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Typical source

Fatty acids (plant or animal)

Plain-language explanation

E477, or propylene glycol esters of fatty acids, is an emulsifier made by combining propylene glycol with fats from either plant or animal sources. Its halal status depends entirely on the origin of the fat; if derived from plant fats or halal-certified animal fat, it is considered halal. However, if the fat comes from a non-halal animal source like pork, it is haram. Therefore, you should look for a halal certification symbol to ensure the source is permissible.