In the United States alone, 25 million people, 80% of them women, suffer from osteoporosis, which means "porous bones." It's a progressive condition that causes bones to become weaker and weaker, making one extremely susceptible to bone fractures.
In the elderly, for example, hip fractures are common, and result in further loss of independence and health. Half of all women between the ages of 45 and 75 show signs of osteoporosis, which actually starts after age 30, before menopause.
However, men suffer from osteoporosis because of side effects of medications they may be taking, lifestyle, and a variety of other factors. The good news is that since bone is living matter, it can restore itself and rebuild.
To find out your bone density, ask your doctor for a "bone-density scan" a noninvasive x-ray.
What else can you do to help bone density?
Regular weight-bearing exercise, like walking, helps to trigger bone-building mechanisms in the body. You might also consider taking calcium supplements, as well as magnesium, potassium, folic acid, boron, and vitamins C, D, E, and K.