Xingen Lei is a Professor of Molecular Nutrition at Cornell University. He received his Ph.D. from Michigan State University and a postdoctoral training at University Missouri. Lei pioneered the application of gene-knockout models to study nutritional genomics of selenium, and revealed dual roles of selenium in oxidative stress and in diabetes. Lei’s creative research developed a new generation of bacterial phytases that are used worldwide by the feed industry. Lei is exploring the nutritional, health, and environmental values of defatted microalgae from the biofuel production as a new generation of food and feed protein. Lei is an international leader of the HarvestPlus program for the global fight against micronutrient deficiencies in humans and brought the program to China. Lei has served on panels for NIH and USDA, many other scientific committees, and Editorial Boards for a number of scientific journals including Journal of Nutrition (Associate Editor) and Annual Review of Animal Biosciences. He has received a number of national and international awards including the Mead Johnson Award and Milton Sunde Award from the American Society for Nutrition and 2017 FASS-AFIA New Frontiers in Animal Nutrition Award and Gary L. Cromwell Award in Mineral Research. He was the founding President of North America Chinese Nutrition Society, and is currently serving as the President of TEMA (International Society of Trace Elements in Man and Animals). He has helped create the annual Far East/Asia-Pacific Selenium Forum since 1991, and served as the Chief Editor of Chinese version of Se: Its Molecular Biology and Role in Human Health.