"Even though white bread and white pasta may taste better than whole wheat, that's where the pros end for white flour foods," said Moskovitz to Prevention. "White flour is processed wheat that has all of the wheat grains' best attributes, like fiber and antioxidants, stripped away." The lack of fiber makes white flour easy to digest, meaning your body doesn't have to burn any extra calories to break it down. This "leaves your metabolism operating at a slower level," adds Zuckerbrot.
What to eat instead: whole wheat bread and whole grains, like quinoa, barley, and millet.