Calcium intake at an early age is important for children, especially girls. Doctors recommend 1200-1500 milligrams of calcium per day during adolescence (ages 11-18). The best source of calcium is food, especially low-fat dairy products or calcium-fortified foods such as orange juice and cereal.
Calcium supplements are available for adults who can’t digest dairy products. Children can take calcium, but they should do so under a doctor’s supervision.
Getting enough sunshine (vitamin D) helps the body absorb calcium. Physical activity, especially sports that involve jumping, also helps increase bone deposits.