Steven B. Heymsfield, M.D. is Professor and Director of the Body Composition-Metabolism Laboratory at the Pennington Biomedical Research Center of the Louisiana State University System in Baton Rouge. He is on the visiting faculty at Harvard Medical School and a former Professor of Medicine at Columbia University, College of Physicians and Surgeons. Dr. Heymsfield has published more than 700 peer-reviewed papers covering topics such as obesity, malnutrition, cancer, cachexia, body composition, and caloric expenditure. His contributions to the study of human nutrition led to the TOPS Award from The Obesity Society (TOS), the Rhoads Award from the American Society of Parenteral and Enteral Nutrition (ASPEN), the Robert H. Herman Memorial Award, American Society of Nutrition (ASN), and the George Bray Founders Award from TOS. Dr. Heymsfield is past president of ASPEN, ASN and TOS. He was appointed as an Amazon Scholar in 2021.

Dympna Gallagher BA, MA, Ed.D. is a Professor of Nutritional Medicine, a Director of the New York Nutrition Obesity Research Center, and Director of the Human Body Composition Laboratories at Columbia University Irving Medical Center, New York. Dr. Gallagher is Chair of a Diversity Equity and Inclusion Working Group from among the 11 NIH-NIDDK funded Nutrition Obesity Centers and leads a program that supports mentoring of early career clinical researchers from diverse backgrounds. Dr. Gallagher research projects have involved human phenotyping in areas with clinical and translational relevance involving pregnancy, newborn, growth, obesity, aging, disease states including type 2 diabetes, bariatric induced weight loss, behavioral lifestyle intervention mediated weight loss and post-weight loss maintenance, methodology development, ethnic differences in body composition. A cornerstone of her work involves precision and rigor in the measurement of body composition. 

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