Tea

Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of Camellia sinensis, an evergreen shrub native to China and East Asia. After water, it is the most widely consumed drink in the world. ... Tea has a stimulating effect in humans primarily due to its caffeine content.

People all over the world have been drinking tea for thousands of centuries, and for good reason. Numerous studies have shown that a variety of teas may boost your immune system, fight off inflammation, and even ward off cancer and heart disease.