2: During. With other natural flavor. 1X caffeine - natural source. Fuel for optimum performance. From the makers of PowerBar. 1X = 25 mg caffeine. This PowerGel product has a dual source energy blend to deliver maximum fuel to muscles. See PowerBar.com for the science. Gluten free. PowerBar is backed by Nestle's worldwide leadership in nutritional science. For more information www.PowerBar.com.