In amount from greatest to least calcium in foods, but most back pain is muscular.
Still couldn’t hurt to get the RDA
Food Milligrams (mg) per serving Percent DV
Yogurt, plain, low fat, 8 ounces 415 42
Sardines, canned in oil, with bones, 3 ounces 324 32
Cheddar cheese, 1.5 ounces 306 31
Milk, nonfat, 8 ounces 302 30
Milk, reduced-fat (2% milk fat), 8 ounces 297 30
Milk, lactose-reduced, 8 ounces** 285–302 29–30
Milk, whole (3.25% milk fat), 8 ounces 291 29
Milk, buttermilk, 8 ounces 285 29
Mozzarella, part skim, 1.5 ounces 275 28
Yogurt, fruit, low fat, 8 ounces 245–384 25–38
Orange juice, calcium-fortified, 6 ounces 200–260 20–26
Tofu, firm, made with calcium sulfate, ½ cup*** 204 20
Salmon, pink, canned, solids with bone, 3 ounces 181 18
Pudding, chocolate, instant, made with 2% milk, ½ cup 153 15
Cottage cheese, 1% milk fat, 1 cup unpacked 138 14
Tofu, soft, made with calcium sulfate, ½ cup*** 138 14
Spinach, cooked, ½ cup 120 12
Ready-to-eat cereal, calcium-fortified, 1 cup 100–1,000 10–100
Instant breakfast drink, various flavors and brands, powder prepared with water, 8 ounces 105–250 10–25
Frozen yogurt, vanilla, soft serve, ½ cup 103 10
Turnip greens, boiled, ½ cup 99 10
Kale, cooked, 1 cup 94 9
Kale, raw, 1 cup 90 9
Ice cream, vanilla, ½ cup 85 8.5
Soy beverage, calcium-fortified, 8 ounces 80–500 8–50
Chinese cabbage, raw, 1 cup 74 7
Tortilla, corn, ready-to-bake/fry, 1 medium 42 4
Tortilla, flour, ready-to-bake/fry, one 6” diameter 37 4
Sour cream, reduced fat, cultured, 2 tablespoons 32 3
Bread, white, 1 ounce 31 3
Broccoli, raw, ½ cup 21 2
Bread, whole-wheat, 1 slice 20 2
Cheese, cream, regular, 1 tablespoon 12 1