Calcium intake above 1400 mg per day is associated with doubling the risk of dying from a heart attack in both men and women. There are many studies showing that in women with osteoporosis who take large doses of calcium are at risk for both heart attacks and stroke.
Although it may be logical to try and replace the lost calcium in bone in osteoporosis by taking in large doses, it turns out that there's a tendency for bone to lost calcium in this setting and that adding large doses to our diet may force a little calcium into bone, it also forces it into our arteries leading to more arteriosclerosis.
Most osteoporosis is caused by deficiencies in more than calcium; vitamin D, vitamin K, and a wide range of minerals that include magnesium, boron, silica, copper, zinc, and others are a large part of the problem.
