Men need testosterone and estrogen as for bone health.

What causes osteoporosis? And why? Your bones are alive and growing - not static, as you see them drawn in the books. Bones are constantly changing throughout life, with some cells of bone dissolution and new bone cells grown in a process called reconstruction. This lifelong turnover of bone cells to replace most of the skeleton every 10 years. P

But for people with osteoporosis - bone thinning - osteoporosis outpacing the growth of new bone. The bones become porous, brittle and prone to fractures. Look for hip x-rays with normal bone density, and you will see a dense matrix of bone cells. But look at the hip with osteoporosis, and you will see mostly air cheap lasix. Bone matrix all but dissolved, and a few thin strands left. P As many as 10 million Americans suffer from osteoporosis and 34 million have low bone mass, called osteopenia, says the National Endowment for osteoporosis. Why bone loss so often? WebMD went to experts to find out. Causes of osteoporosis may surprise you. Bone density is greatest at the age of 20 years. But as you grow old, you can lose bone mass from many factors. Osteoporosis or osteopenia early sign warning indicates an imbalance in the process of reconstruction: P Too many broken bones, and too little new bone is built back. Fragile bones result, prone to fracture. You probably know that you need calcium to build strong bones, but a low calcium diet is not the only offender. There are lesser known causes of osteoporosis. Experts now believe that a combination of reasons, often to blame in the loss of bone mass. What are the most common cause of osteoporosis? "Overall, this lack of estrogen in women," says Paul Mystkowski, MD, endocrinologist Virginia Mason Medical Center in Seattle and clinical professor of the University of Washington in Seattle. Loss of bone mass faster after menopause, when older women have a more rapid drop in estrogen levels. Over time, the risk of osteoporosis and fractures increases older women lose more bone than replaced. Young women who stop menstruating - such as fine athletes and girls with anorexia - also compromised bone density, according to a recent report by U.S. Surgeon General, "Bone Health and Osteoporosis."

The presence of both ovaries removed by surgery called bilateral ovariectomy, may also lead to osteoporosis and low bone density. In one study, the operation led to a 54% increase in hip, spine and wrist in postmenopausal women.

Men need testosterone and estrogen as for bone health. This is because men convert testosterone into estrogen bone preservation. "There's a clear consensus that if you evaluation of men with osteoporosis," says Mystkowski ", you will always appreciate the testosterone deficiency."