Good bacteria can improve your digestion, immunity, and even heart health. Now a report in Psychiatry Research shows it may boost your mood as well.

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Fermented foods like yogurt and sauerkraut, which are breeding grounds for healthy germs, are known to soothe the stomach. But a survey of 700 college students found that those who regularly ate those foods also had much less social anxiety than those who didn’t.

Why? A Texas Tech study recently found that some gut germs act as tiny psychiatric drug-making machines, pumping out beneficial neurochemicals.

So hit the fermented fare often (our addiction: Oikos Triple Zero yogurt) and let the microbes do their happy dance in your head.