BTW, this eerily resembles questions involving the myth that humans only use 10% of our mental capacity. Evolution is never so needlessly profligate (the human brain consist of only 2 percent of total body weight, yet demands 20 percent of our resting metabolic energy.)
Causes of osteoporosis. Osteoporosis causes bones to become less dense and more fragile. Some people are more at risk than others. Bones are at their thickest and strongest in your early adult life and their density increases until your late 20s. But you gradually start losing bone density from around the age of 35.en continue producing testosterone into old age, but the risk of osteoporosis is increased in men with low levels of testosterone. In around half of men, the exact cause of low testosterone levels is unknown, but known causes include: 1  the use of certain medications, such as oral glucocorticoids. 2  alcohol misuse.
Osteoporosis is a disease where decreased bone strength increases the risk of a broken bone. It is the most common reason for a broken bone among people who are old.Bones that commonly break include the back bones, the bones of the forearm, and the hip. Until a broken bone occurs there are typically no symptoms. The most important risk factors for osteoporosis are advanced age (in both men and women) and female sex; estrogen deficiency following menopause or oophorectomy is correlated with a rapid reduction in bone mineral density, while in men, a decrease in testosterone levels has a comparable (but less pronounced) effect.