Does green tea have caffeine in it？

Yes, green tea contains caffeine, although generally in lesser amounts than black tea or coffee. The caffeine content in green tea can vary greatly depending on the type of green tea, where it’s grown, how it’s processed, and how it’s brewed. On average, an 8-ounce (240-milliliter) cup of green tea contains between 30 to 50 milligrams of caffeine.

For comparison, the same amount of black tea ranges from about 40 to 70 milligrams of caffeine, and an 8-ounce cup of coffee typically contains about 80 to 100 milligrams of caffeine.

People who are sensitive to caffeine or who are trying to reduce their caffeine intake may opt for decaffeinated green tea or simply limit the number of cups they consume each day.