Dairy products have high levels of calcium per serving, which is why they're often recommended for bone health. But calcium from other sources -- like spinach, bok choy, and mustard greens, beans, tofu, almonds, fish, and many fortified cereals and juices -- can help just as much. But it can be hard to get enough calcium if you don’t eat any dairy. And it’s best to get calcium from foods, not supplements.