Do you often have cramps in your hands and feet? Do you often have back pain? Have you become shorter in height in recent years? Has your back become hunched? Have you had a fracture inadvertently? Then, you may have osteoporosis. More than 1 in 4 postmenopausal women and more than 1 in 6 men over 60 years of age suffer from osteoporosis. Osteoporosis is very dangerous, affecting the quality of life in mild cases due to back pain and hunchback, and in severe cases hip and limb fractures, with a mortality rate of 20% and a disability rate of 50% within a year. Most patients have fractures without obvious trauma, so osteoporosis is the invisible killer of middle and old age. The World Health Organization has listed osteoporosis, along with tumors, cardiovascular diseases and AIDS, as the four major diseases affecting human health in the 21st century. If you are a postmenopausal woman or a man over 60 years of age, or if you experience any of the above symptoms, please visit a specialist clinic for professional consultation and treatment.