does green tea have caffeine

Yes, green tea does contain caffeine. An 8-ounce cup of green tea typically contains between 30 and 50 milligrams of caffeine, which is less than black tea and much less than coffee. Factors such as the type of green tea, brewing time, and water temperature can influence the exact caffeine content. Green tea also contains the amino acid L-theanine, which works synergistically with caffeine to provide a gentler and steadier boost of alertness compared to coffee. Decaffeinated green tea options are also available for those sensitive to caffeine or aiming to reduce their intake.