Osteoporosis is a condition where bones become weak and are more likely to break. It is more common in older adults, especially women. Common causes include lack of calcium and vitamin D, lack of exercise, smoking, and excessive alcohol consumption. To prevent osteoporosis, one can maintain a balanced diet rich in calcium and vitamin D, engage in regular weight-bearing exercises like walking or running, and avoid unhealthy habits. If you suspect you have osteoporosis, it's important to see a doctor for proper diagnosis and treatment.