Robert Lustig is an American pediatric endocrinologist and author known for his research on the effects of sugar on health. He gained prominence for his views on the role of sugar in obesity and metabolic diseases, particularly through his popular lectures and the book titled Fat Chance: Beating the Odds Against Sugar, Processed Food, Obesity, and Disease. Lustig advocates for reducing sugar consumption and has been a vocal critic of the food industry’s practices. He emphasizes the importance of understanding the impact of fructose and processed foods on the body, aiming to educate the public about healthier dietary choices.