Dr. Katrina Nguyen is an award-winning, board-certified pediatric gastroenterologist, an international best-selling author, and founder of a nonprofit to fight childhood obesity. She is a Clinical Associate Professor at the University of Illinois College of Medicine in Rockford. She has shared her expertise via the EWTN Global Catholic Network, the YMCA podcast, and the American Academy of Pediatrics. Dr. Nguyen lives in Illinois with her husband, Marconi. She enjoys being a dog mom, gardening, and traveling.

Dr. Nguyen shares the multiple losses she has experienced in her life, including the passing of her beloved dog, Corky, in October 2021.