For example, a slice of Swiss cheese on a turkey sandwich adds about 250 mg of calcium. A tablespoon of parmesan cheese sprinkled on a Caesar salad yields an extra 75 mg of calcium. Many vegetables, including broccoli, spinach, kale, green beans and squash, also contain calcium. Supplements are another source of calcium, but should not take the place of foods. Some supplements were recently found to contain small amounts of lead, which most manufacturers have readily agreed to remove.
Supplements come in different forms, to suit different preferences.
Least expensive and most widely available. Particularly effective in reducing lead absorption. Highly concentrated so fewer tablets are necessary. Should be taken with meals. Can cause constipation.