Wouldn't it be great if there were a magical elixir that helped us burn a few calories? Well, it turns out coffee may do just that. According to a study published by "Physiology and Behavior," people who drank coffee increased their metabolic rate by 16 percent over those who didn't. And as we all know, the faster your metabolism, the more calories you burn. Another bonus? Coffee has been shown to improve endurance levels, meaning if you down your cup before hitting the gym, you can potentially workout longer, and harder, which also translates into burning more calories. Just make sure to skip the cream and sugar because just like our go-to dress, coffee is most slimming when black.