While there are both pros and cons to consuming coffee, there are studies that prove that it has been shown to improve your metabolism. Dr. Zenhausern noted that, according to these studies, drinking three cups of coffee (about 270 mg), can "burn an extra 300 calories a day." However, in order to reap these benefits, it is important to ensure that you are drinking your coffee black, as opposed to adding sweeteners or dairy to it. For extra flavor and an additional metabolism boost, try adding ground cinnamon to your coffee instead.