Energy drinks are imagined to do just what the identify implies -- offer you an additional burst of energy. Because it turns out, most of that "energy" comes from two essential substances: sugar and caffeine. A typical power drink can contain up to 80 milligrams of caffeine (about the same quantity as a cup of espresso). By comparability, a 2006 examine found that the average 12-ounce soda comprises 18 to forty eight mg of caffeine. Other than caffeine ranges, how do power drinks differ from sodas and sports drinks? Soft drinks are primarily water, sugar and flavoring. They don't do anything in your body