Before you can open a SHP file, you'll need to figure out what kind of file the SHP file extension refers to. Tip: Incorrect SHP file association errors can be a symptom of other underlying issues within your Windows operating system.
RDA for Calcium. According to the Institute of Medicine, the recommended dietary allowance for calcium for healthy males between the ages of 19 and 70 years is 1,000 milligrams per day. The recommendations increase to 1,200 milligrams for males after age 70. Vitamin D is also essential for absorption of calcium, and the RDA for vitamin D for men between ages 19 and 70 is approximately 600 IU per day and 800 units per day over age 70.
And a supplement of 600 milligrams of calcium with 300 mg of magnesium daily is safe to take and may provide benefits. But you can get too much of a good thing from calcium supplements. One study showed men 50-71 who take a 1,000 mg daily calcium supplement increase their risk of dying from heart disease by 20 percent. The reason? Calcium gets into the lining of the blood vessels, making arteries stiffer. However, 1,000 mg of calcium a day from food is part of a bone and heart-friendly diet.