A number of emulsifiers (added as ingredients to processed foods & drinks) with the prefix 'E' have been studied and confirmed to have been derived from meat origins, the sources of which are considered HARAM or forbidden by Islam. Details of such emulsifiers (including E472 & E474) are as listed in the following website: http://www.iccservices.org.uk/halal_food_meat/halal_haram_ingredients.htm