Frank Hu, MD, MPH, PhD, is a world-leading researcher in diet, chronic disease prevention, and healthy aging. He is the Fredrick J. Stare Professor of Nutrition and Epidemiology, Chair of the Department of Nutrition at the Harvard T.H. Chan School of Public Health, and a Professor of Medicine at Harvard Medical School. His pioneering work has shaped the understanding of how diet and lifestyle influence cardiometabolic diseases and healthy aging. He has published over 1,000 scientific papers and is among the top 10 most cited researchers in medicine and public health in the world (H-index 320). His research has been instrumental in advancing precision nutrition, dietary biomarkers, and global efforts to combat chronic disease. His work has significantly influenced national and international dietary guidelines, including his role on the 2015 U.S. Dietary Guidelines Advisory Committee. His contributions to nutrition science and policy have been recognized with numerous honors, including the Kelly West Award for Outstanding Achievement in Epidemiology by the American Diabetes Association, the American Heart Association’ Ancel Keys Memorial Lecturer, and a member of the National Academy of Medicine.