The Benefit: You Boost Your Mood Without Really Trying "In a lot of cases, yellow or dark teeth tend to hold people back," says Levine. The less you smile, the more you miss out on opportunities to exude approval, power, friendship, attraction and even a positive outlook on life. "Smiling increases the production of serotonin [and] has been scientifically proven to elevate the mood of both the person giving the [smile] and the person receiving it," Levine explains. With a whiter and brighter smile, you're prone to smile more often and project more confidence. The end result? Way more self-esteem, no self-help books or motivational speakers required.
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