Groundbreaking research from Harvard T.H. Chan School of Public Health reveals there's no one-size-fits-all diet that's best for everyone. Professor Frank Hu, chair of Harvard's Department of Nutrition and Epidemiology, emphasizes that while individual dietary needs vary, successful eating patterns share fundamental principles: eliminating processed foods and focusing on whole foods like fresh fruits and vegetables, whole grains, nuts, legumes, and healthy fats such as olive oil. The most liberating finding? "You don't have to follow a rigid regimen," Hu states, offering flexibility to adapt these evidence-based principles to your preferences, culture, and lifestyle for sustainable long-term health outcomes.