Green tea is an acquired taste, but one that you may want to cultivate if you (like me) suffer from mental and emotional overload from time to time (insert picture of frazzled parent here). In a recent study conducted in Japan, people drinking five cups of green tea per day lowered the likelihood of experiencing mental distress by 20 percent. Although green tea contains caffeine (at smaller amounts than in black tea or regular coffee) green tea also contains compounds like L-theanine, a naturally occurring amino acid that has a calming, focusing effect on the mind.

If you shun green tea because of its strong, grassy taste, you might prefer a flavored variety, such as Mighty Leaf’s jasmine green or the kiwi pear green tea from Republic of Tea. Celestial Seasonings has also recently come out with a line of green teas blended with white tea for a smoother taste. A small amount of honey or agave nectar never hurts the taste, either, though it does add calories to an otherwise zero-calorie beverage.