Look for: “Look at total carbohydrates, and then look at the dietary fiber,” advises Dr.
Look for: “Look at total carbohydrates, and then look at the dietary fiber,” advises Dr. Lustig. “What you’re looking for is a total carbohydrate-to-fiber ratio of less than 5:1.” (So if a food has 15 grams of total carbs, it should have at least 3 grams of fiber—unless it’s a food that naturally contains no fiber, like plain yogurt.)