Up to age 30 to 35, more bone is reformed than lost. After about age 35, more bone is lost than reformed. People can lose up to 1 percent of their bone mass each year. In addition, calcium absorption becomes less efficient with age. Family History .
Osteoporosis tends to run in families.
People may inherit a tendency for osteoporosis. People in the same family may also have similar lifestyle and dietary habits that increase their risk of developing osteoporosis. Calcium Intake . The need for calcium in bone formation is a life-long process. During childhood and teen years, bones grow long and wide.