Harvard evolutionary biologist offers eight healthy-eating tips

Harvard evolutionary biologist Daniel Lieberman's new book, 'Fed Up,' offers eight tips for healthy eating, urging skepticism of fad diets and promoting balanced, minimally processed traditional diets. Lieberman warns against magic-bullet diets, saying none is optimal and all foods have costs and benefits. He recommends unprocessed plant-based foods, modest animal products, unsaturated fats, and regular exercise, while noting humans never evolved to lose weight. The tips come from Lieberman's book 'Fed Up,' published by Alfred A. Knopf, in which he and his wife tested popular diets like Paleo and Atkins for two weeks.