Want to know what food really does to your body? Forget the headlines, watch our intriguing investigations with 500 volunteers as we expose the real science behind the food we eat. What we eat can change our lives. How to Be Healthy follows nine fast- food junkies to an enclosure at a British zoo as they crunch their way through half a ton of raw fruits and vegetables in just 12 days. Join two truckers who have to swallow an unusual pill to get their internal traffic jams moving. Learn how the bacteria in the gut also enjoy our food, and how it can lead to windy side effects.