Tofu, also referred to as bean curd, is a soy product that is made by coagulating soy milk and pressing the curds into blocks. When a calcium compound is used as the curdling agent, the tofu becomes a good source of calcium, which can help maintain healthy bones. Swap out lean meat for tofu in your favorite stir-fry, or try my Sweet-and-Sour Tofu-Veggie Stir-fry recipe. It’s loaded with nearly every bone-strengthening ingredient known to nutritionists!