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 shakes and pre-workout mixes are popular among gym-goers, but they might signal a deeper issue for some young adults.

A new study is linking the use of six muscle-building supplements to symptoms of body dysmorphia in teens. The study author found that substances like whey protein powder, creatine products and other supplements were often taken by teens trying to gain muscle.