Rheumatoid arthritis (RA), steroids, a sedentary lifestyle, being low on vitamin D — these all are risk factors for developing osteoporosis and may be part of the lives of people with RA. Although being a postmenopausal woman tends to be one of the more familiar risk factors, people of all ages who have RA also experience a higher risk. What is osteoporosis? What can you do to prevent it? What can you do if you have it?