Dr. Richard Johnson is a Professor of Medicine at the University of Colorado and is both a clinician, educator, and researcher. He is board-certified in internal medicine, infectious diseases, and kidney disease and is the founding editor of Comprehensive Clinical Nephrology, one of the main textbooks on kidney disease. For more than 20 years, he has led research on the cause of obesity and diabetes, with especial interest in the role of sugar (especially fructose) and uric acid. His research has been highly cited, published in top medical journals, and supported by grants from the National Institutes of Health. He is the author of The Sugar Fix and The Fat Switch. His latest work contains state-of-the-art discoveries on the cause of obesity and potential cures. Currently, Dr. Johnson lives in Colorado with his wife, kids, and two rambunctious puppies.