I cant' figure this one out. Any help?

Vegans eliminate all milk products from their diets. This pyramid category is of course important in meeting the dietary requirements of calcium and vitamin D. However, both of these nutrients are contained in fortified grains and are not the main problem with eliminating milk products from the diet. What other important vitamins would be eliminated from the Vegans diet by removing milk products? What other food could they substitute to fulfill the missing vitamin requirements?