Reports claim that Botox can make a person less receptive to negative emotional stimuli. In fact, many individuals have opted to paralyze their facial muscles with the anti-wrinkle injectable.

To determine the treatment’s effectiveness, researchers tested the subjects and the speed of their responses to emotionally charged statements before and after the procedure.

The results indicated that the “happy” responses were the same, but the responses on sad and annoying statements were much more delayed.

“Normally, the brain would be sending signals to the periphery to frown, and the extent of the frown would be sent back to the brain,” explained one of the researchers to Newsweek. “But here, that loop is disrupted, and the intensity of the emotion and of our ability to understand it when embodied in language is disrupted.”