As the Olympic torch edges closer to Rio, we explore how food can make you a better athlete. We start in Brazil where we meet the man responsible for feeding the best athletes on the planet - from a kitchen the size of three football fields. Our producer has a kick about with Arsenal Football Club’s nutritionist in London, and we talk to Olympians past and present about what they eat. We delve into the science of nutrigenomics and ask whether you can give athletes an edge by designing their diets around their DNA. At what point does a specialist diet give an athlete an unfair advantage? And what do nutritionists and athletes really think about sports drinks? Plus, a man moves his family to the Kenyan highlands to train and eat with its highland runners. And, a New York punk singer and vegan Ironman tells us why he thinks strong athletes do not need meat.(Photo: Athletes running through a field. Credit: Simon Maina/AFP/Getty Images)

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