Bone is living tissue that is constantly being broken down and replaced. Osteoporosis occurs when the creation of new bone doesn't keep up with the loss of old bone. Symptoms: - Back pain, caused by a fractured or collapsed vertebra - Loss of height over time - A stooped posture - A bone that breaks much more easily than expected Causes: -Old age - Menopause - Disbalanced hormone levels such as thyroid issues - Low calcium intake - Medication Prevention and treatment: - Maintain appropriate body weight - Taking adequate amounts of Calcium everyday - Taking Vitamin D - Excercising regularly Source : mayoclinic.org