Although at first glance they are similar and, sometimes, they are used for the same purpose, butter and margarine are two different products from the point of view of the technological processes that are followed to make them. Butter is obtained from milk fat, which comes from a wide variety of animals, although the most common are cows, sheep or goats. Margarine, on the other hand, is made from different vegetable fats such as soy, corn or sunflower and goes through a hydrogenation process associated with trans fats, in which the fats are artificially unsaturated.