Leafy greens
Leafy greens are a great source of calcium, especially dark greens like spinach, mustard leaves, bok choy, turnip greens, and kale. Two cups of turnip greens contain about 394 milligrams of calcium, and two cups of kale contain 188 milligrams. If you don’t like eating these dark leafy greens in your salad, try mixing them into a smoothie or adding them to a sandwich.