No scientific evidence shows any meaningful difference between the nutritional values of pasteurized and unpasteurized (raw) milk. In addition, vitamin D, which is not found in significant amounts in raw milk, is added to pasteurized milk, making it an even more nutritious product. It is important to understand that pasteurizing milk does not cause lactose intolerance or allergic reactions. Both raw milk and pasteurized milk can cause allergic reactions in people sensitive to milk proteins.