If you've ever struggled from the dreaded afternoon energy slump around 2 p.m., you're not alone. While you could always grab another cup of coffee, over-doing the caffeine may not be such a good idea. As it turns out, there are a few reasons why you may be lacking energy throughout the day. But luckily, for each one, there is a food that offers the nutrients you need to fight fatigue and keep yourself chipper and focused. Check out the gallery below.