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. Osteoporosis is caused by the loss of calcium from bones, and will often cause the bones to ache and hurt. Bones with osteoporosis are thin and fragile, making them much more susceptible to fractures and breaks.Slow loss of calcium in the bones naturally occurs in everyone with aging, but very slowly.hrough the secretion of parathyroid hormone (PTH), the parathyroid glands regulate how much calcium is absorbed from our diet, how much calcium is released into the urine, and how much calcium is given up by the bones (bones are the major storage area for calcium).