Smiling helps reduce stress. In a 2012 study published in the journal Psychological Science, University of Kansas psychological scientists Tara Kraft and Sarah Pressman studied 170 participants who were told to hold chopsticks in their mouths in three formations, making them smile to various degrees without realizing it, after performing a stressful task. The experiment revealed that subjects who smiled the biggest with the chopsticks experienced a substantial reduction in heart rate and quicker stress recovery compared to those whose expressions remained neutral. Smiling makes you more approachable. workopolis.com A 2004 Penn State University study found that authentic smiles shared by employees in the service industry influenced their impressions on customers in a positive way. Smiling employees came across as more likable and friendly, and customers left the interactions feeling more satisfied about their overall experience. While job performance and the busyness of the venues were ...