Carlos A. Monteiro, MD, PhD, is Professor Emeritus at the University of São Paulo (USP), Brazil, where he founded the USP Center for Epidemiological Studies in Health and Nutrition (CESHN) in 1990. Under his leadership, the USP CESHN developed and refined the ultra-processed food (UPF) construct and the Nova classification system that defines UPFs, now used worldwide in hundreds of studies and incorporated into the national dietary guidelines of more than 10 countries. Over the past 35 years, Dr. Monteiro has served WHO, PAHO, UNICEF, FAO, and other organizations, including as a member of WHO’s Nutrition Guidance Expert Advisory Group (2010–2023). He has authored more than 300 publications, with over 30,000 citations (Web of Science H index: 90), and has ranked among the top 1% most cited researchers in his field from 2019 to 2025.