When it comes to nutrition, we all have our beliefs—tenets that may have been formed based on our parents' philosophies, what our friends and doctors tell us, what we read on the Internet or hear in the news. Trouble is, if we're acting on nutrition beliefs that are false, misleading or outdated, we're not likely to experience the high standard of health we want. That's why it pays to periodically test our knowledge and see if our beliefs hold up to the latest in science. Take the quiz below and find out if you know your nutrition facts from fiction.