Muscle-building supplements may put teens at risk for a body image disorder, study finds

Protein bars, shakes and pre-workout mixes are often used to maximize results at the gym. The supplements are also associated with muscle dysmorphia, a study shows.

​ Protein bars, shakes and pre-workout mixes are often used to maximize results at the gym. The supplements are also associated with muscle dysmorphia, a study shows. Read More Breaking News, Latest News and Videos | CNN