Mono and Diglyceride Flakes (e471) aka Glycerin Flakes do not actually contain glycerin. They are derived from fatty acids (typically vegetable oils) attached to glycerol. They are primary used to emulsify fat molecules with water. They work with to all types of products containing water.
This product is equivalent to Texturas Glice
This product is certified Kosher (Pareve) by the Orthodox Union