Regular Smiling May Boost Mood, Reduce Stress and Influence Health

Laboratory experiments demonstrate that forcing a smile while watching uplifting content can enhance amusement, supporting the facial-feedback hypothesis. Clinical neuropsychologist Judy Ho explains that smiling lowers cortisol levels and triggers endorphins, dopamine and serotonin, which together diminish heart-rate spikes during stressful tasks. Stanford professor Jeanne Tsai’s cross-cultural work shows that Americans tend to view broad, toothy smiles as friendly, whereas many East Asian cultures interpret them as unstable and prefer calmer expressions.

The Orange County Academy of Sciences and Arts in Southern California has institutionalized a smile-centric philosophy, claiming it relaxes students and boosts confidence. However, forced-smile policies in workplaces have drawn criticism for undermining authentic emotional expression, especially among women and people of color.