Dr. Schafer is Chief of Endocrinology and Metabolism for the San Francisco VA Health Care System and Associate Professor of Medicine and of Epidemiology and Biostatistics at UC San Francisco. She is board-certified by the American Board of Internal Medicine in the subspecialty of Endocrinology, Diabetes and Metabolism. Her research focus is osteoporosis and bone metabolism. One of her research emphases is osteoporosis treatment and the assessment of response to osteoporosis therapy. She also studies the relationships between bone, fat, and glucose metabolism, including the effects of obesity and diabetes on bone, and the skeletal regulation of energy metabolism. Currently, she is investigating the effects of bariatric surgery (weight loss surgery) on calcium metabolism and skeletal health. Dr. Schafer's research has been funded by the NIH (National Institute of Diabetes and Digestive and Kidney Diseases), the US Department of Veterans Affairs, and the American Society for Bone and Mineral Research.