Don't get me wrong, I'm a true believer of proper fuel and good eats (just check out my former post on the Mediterranean diet!), but according to this new study, if you had to pick one, sleep edges out ahead of food. A deficiency in sleep will affect memory, diminish task performance, impair learning and stunt physical regeneration. As studies show, only 2.5% of the population can really function on less than 8 hours of sleep. So besides eating healthy, also get that good dose of shut-eye too!