Samuel Klein, M.D.

Samuel Klein, M.D., is the William H. Danforth Professor of Medicine and Nutritional Science, Director of the Center for Human Nutrition, Chief of the Division of Geriatrics and Nutritional Science, Medical Director of the Weight Management Center, and Associate Program Director of the General Clinical Research Center at Washington University School of Medicine in St. Louis, Missouri. He also serves as Medical Director of the Nutrition Support Service at Barnes-Jewish Hospital in St. Louis. Dr. Klein received an MD degree from Temple University Medical School in 1979 and an MS Degree in Nutritional Biochemistry and Metabolism from the Massachusetts Institute of Technology in 1984. He completed residency training in Internal Medicine and a Clinical Nutrition fellowship at University Hospital in Boston, a National Institutes of Health Nutrition and Metabolism Research fellowship at Harvard Medical School, and a Gastroenterology fellowship at The Mt.Sinai Hospital in New York. He is board certified in Internal Medicine, Gastroenterology, and Nutrition.

Dr. Klein is active in numerous national committees; he is past President of the North American Association for the Study of Obesity, President of the American Board of Nutrition, and President-elect of the American Society for Clinical Nutrition. He is an Associate Editor of Gastroenterology and serves on the editorial board of the American Journal of Physiology (Endocrinology & Metabolism).

Dr. Klein’s research activities involve the use of stable isotope tracers to study the regulation of substrate metabolism in humans in vivo. His laboratory is particularly interested in the pathophysiology of lipid metabolism in obesity.