Since ancient times, green tea has been known as a healthy and rejuvenating drink. Green tea originated in China, tracing all the way back to 2737 B.C. when the Chinese emperor mistakenly drank water ...

Drinking green tea has its benefits, but it has caffeine, too. A good caffeinated beverage is a favorite of many folks—especially in the morning. While coffee holds the top spot for the nation’s ...

Both coffee and green tea can boost energy and support your heart. Experts say the best one for you depends on your health ...

Medically reviewed by Aviv Joshua, MSMedically reviewed by Aviv Joshua, MS Green tea is a popular type of tea made from the unoxidized leaves of the Camellia sinensis bush. It is less processed than ...

Green tea contains caffeine and tannins, an antioxidant that can mess with iron absorption. So drinking it at certain times ...

Medically reviewed by Aviv Joshua, MS, RDN Key Takeaways Black tea has more caffeine than green tea.Green tea and black tea ...

Green tea extract and caffeine are often combined in supplements to enhance energy, focus, and fat metabolism. When taken together, they may offer synergistic benefits but raise the risk of side ...

Drinking green tea with L-theanine can cause calm alertness because the caffeine in the tea wakes you up, while L-theanine promotes relaxation.

Amounts of caffeine vary between teas, with black tea containing the most caffeine. Green and white teas contain the least, except for noncaffeinated teas. Tea is one of the most popular beverages in ...