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Smiling Reduces Stress

Many scientists have deduced that, when you smile, it reduces the levels of cortisol produced in your brain, effectively minimizing the stress you feel. This is backed up by a 2012 University of Kansas study, which found that those participants who smiled while performing a strenuous task (even if the smile was not genuine) had a lower heart rate and were less stressed out than those who were not smiling.

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