Before you yuck Dr. Oz’s yum, sardines are not only a great source of lean protein and heart-healthy omega-3 fatty acids, but dipping them in olive oil ups their fat-burning quotient, he writes in his newest book Food Can Fix It: The Superfood Switch to Fight Far, Defy Aging and Eat Your Way Healthy. This is a trick he learned from body builders who live to turn fat into lean muscle mass. “I love sardines. They are great for fat burning,” he tells Reader’s Digest at a Manhattan book launch. Sardines are rich in calcium so they also strengthen bones. As a bonus, sardines make the list of foods that may add years to your life.