Calcium is a mineral that’s necessary for the proper function of nerves, muscles, and hormones. Nearly all of the body's calcium is stored in its bones and teeth, keeping them strong and healthy. Calcium is found in many foods, including milk, yogurt, cheese, kale, broccoli, Chinese cabbage, white beans, black-eyed peas, sardines, and almonds. Most adults over 19 years old should aim for 1,000mg a day (Children and teenagers ages 9 to 18 should aim for 1,300mg a day. It’s important to pair calcium sources with vitamin D, since it helps the body to absorb the stuff.