Smiling can boost mood and health, experts say

Smiling more often could be a simple yet powerful tool for improving mental and physical health, experts say ^[1]. According to Stanford psychology professor Jeanne Tsai, the facial feedback hypothesis suggests that physically smiling—even without a reason—can trigger positive emotions. In a classic experiment, people who held pencils in their mouths to simulate a smile reported feeling more amused while watching a cartoon ^[2].

The effect extends beyond mood. Dr. Judy Ho, a clinical neuropsychologist in Los Angeles, says smiling can lower cortisol levels and boost brain chemicals like endorphins, dopamine, and serotonin ^[1]. People who smiled during stressful tasks showed lower heart rates during recovery, suggesting a calming physiological impact ^[2].

This isn’t just theory. At the Orange County Academy of Sciences and Arts in Southern California, smiling is part of a school-wide philosophy: it builds trust, reduces stress, and helps students feel seen ^[1]. Principal RaNae Posey says the goal is to help children form habits of focusing on the bright side.

But not all smiles are treated equally. Cultural differences shape perception: while Americans often associate big, toothy grins with warmth, East Asian cultures tend to value calm, restrained expressions, viewing exaggerated smiles as emotionally unstable ^[1]. In Thailand, where there are nearly 30 words for 'smile,' smiling is a sign of respect and composure ^[2].

Yet mandating smiles can backfire. Last year, Target faced backlash for requiring employees to smile within 10 feet of customers and greet them at 4 feet ^[2]. Experts warn that forced smiles can erode emotional autonomy, turning a wellness tool into a source of stress.

The key, experts say, is authenticity. Smiling should be voluntary, not performative ^[1]. As Ho notes, a genuine smile during tense moments—like a holiday family gathering—might help soften conflict and signal care. The story was first reported by New York Post and The Independent.