If you eat milk, cheese, or yogurt, you probably get enough calcium to keep your bones strong. But if you go vegan, you'll need other sources of calcium. These include fortified soy and almond milk and orange juice, with small amounts of calcium in seeds, nuts, and some green vegetables. People who avoid dairy products also miss out on vitamin D. Non-meat sources include tofu made with calcium sulfate, and fortified milk alternatives like soy and almond milk. Some vegetarians may need to consider a supplement.