Dr. Mark Hyman, director of the Cleveland Clinic's Center for Functional Medicine, thinks we never should have told people to stop eating fat.
In a recent interview with The New York Times, Hyman talks about switching from a low-fat, carb-heavy diet - which he says wasn't giving him the results he wanted - to one that incorporates healthy fats from things like fish and nuts.
He recently wrote the book "Eat Fat: Get Thin," which focuses on incorporating high-fat, plant-based foods into your diet.
Here's a look at some of the high-fat staples Hyman includes in his eating regimen, along with some of the foods he avoids, and what the research says about them: