It turns out that "service with a smile" might not be the best policy. At least not if your boss cares about your mental health, because a new study just found that forcing a smile for customers is linked to more drinking after work.

The study looked at jobs where people have to interact with the general public. Like nurses, teachers, and fast food workers It found that people who have to smile a lot, or suppress negative emotions tend to drink more after their shift ends.

The head researcher thinks it's because we all have a limited amount of self-control each day. And if you have to waste it on pretending to be happy at work, you don't have much left over to control how much you drink.