Is it really necessary to spend a small fortune on scientifically-formulated sports nutrition products, or can I just stick to what my grandma used to make - a good old-fashioned peanut butter and banana sandwich? I mean, if pro riders can get away with eating pizza and ice cream during the Tour de France, whats the real difference between a gel pack and a handful of jelly beans? Are we just being sold a bunch of overpriced, overhyped products that dont actually make a difference in our performance, or is there some real science behind it all? What are the key factors to consider when choosing my race day nutrition, and how do I separate the marketing hype from the actual facts?