Osteoporosis may occur due to the following reasons: Family history Frequent falls A previous fracture Long-term bed rest Little physical activity Low body weight A diet low in calcium and vitamin D High alcohol intake Smoking Certain medications in long-term use such as corticosteroids Age 60+ Chronic disorders such as anorexia nervosa, malabsorption syndromes including coeliac disease and Crohn''s disease, chronic liver disease, primary hyperparathyroidism, post-transplantation, chronic renal failure, hyperthyroidism, Cushing''s syndrome, arthriti