When people think about "energy" drinks, they're usually referring to products that contain caffeine. The problem is that most "energy drinks" are loaded with
too much caffeine and sugar, so while they may give you a short-term burst of energy, you'll ultimately crash and just want to zonk out. When you need a brain boost, you're better off sipping green tea or snacking on a handful of walnuts.
(Click here to see 10 more foods that boost brainpower).
