lol!
Kracus isn't entirely wrong though, only for 99,9%
Lactic acid in food
Lactic acid is used in a variety of food stuffs to act as an acidity regulator. Although it can be fermented from lactose (milk sugar), most commercially used lactic acid is derived from bacteria such as Bascillus acidilacti, Lactobascillus delbueckii or L. bulgaricuswhey to ferment carbohydrates from sources such as the cornstarch, potatoes or molasses. Thus, although it is commonly known as "milk acid", products claiming to be vegan do sometimes feature lactic acid as an ingredient.