From age 25 to 50, you need a daily intake of 1,000 mg. While pregnant or nursing, you need 1,200 to 1,500 milligrams a day. Keep in mind that these amounts relate to total calcium intake including dietary sources. If your diet is lacking in calcium, many brands of supplements are available. Other nutrients are equally important for strong bones.
Vitamin D is essential for adequate absorption and utilization of calcium.
Using sunblock is always best so be sure to allow more time. Today, vitamin D is also added to milk products. Magnesium is similarly essential for calcium absorption and is found in many foods. You need 250 to 300 mg daily. Many supplements are available, even some that combine calcium with magnesium.