E471
Mono- and Diglycerides of fatty acids (glyceryl monostearate, glyceryl distearate) - Emulsifier

Because E471 is derived from Glycerine (Glycerol) (see E422), there may be a slim chance that E471 might contain animal fats.


E422
Glycerol (Humectant, Solvent, Sweet Glycerin) - Sweetener

There is contention surrounding the origins of Glycerol. Through various industrial reselling practices, a majority of glycerine originates as a by-product of soap manufacturing. Many soaps are manufactured using animal fats. This indicates that even though glycerine occurs naturally in plants, what ends up in food and soap products mostly originates from animals.