These drinks promise to leave you more alert, focused and invigorated, but do they really work? Dr. Oz breaks down how energy drinks affect your body.
Click here for Part 2 of Energy Drinks: Do They Work?
Click here for Part 3 of Energy Drinks: Do They Work?
Click here for Part 4 of Energy Drinks: Do They Work?
Click here for more about the side effects of energy drinks.