If you regularly find yourself feeling sluggish and bummed in the early-to-mid afternoon, it’s probably because that’s typically when your levels of serotonin take a nosedive, according to Eric Braverman, a New York City-based physician.


To beat the blues (while regulating your blood sugar, too), have a small snack that’s rich in mood-boosting B vitamins and complex carbohydrates—think a small bowl of yogurt mixed with whole-grain cereal.