Power Burst - or Bust

A healthy adult can probably safely sip one 16-ounce energy drink per workout, but downing more could lead to health risks. These concoctions are packed with ingredients that aren't regulated by the FDA and can cause high blood pressure, restlessness, and dehydration. The beverages are extra dicey if you have a heart condition or other chronic disease, so get your doctor's OK before popping the lid.