does green tea have caffeine

Yes, green tea does contain caffeine, although the amount is generally lower compared to other caffeinated beverages like coffee or energy drinks.

Here are some key points about the caffeine content in green tea:

• An 8-ounce (230-ml) cup of green tea typically contains between 30 and 50 mg of caffeine245.
• The exact amount can vary based on factors such as the type of green tea, the age of the tea leaves (younger leaves tend to have more caffeine), and the brewing method (including the amount of tea leaves used, brewing time, and water temperature)145.
• Some specific types of green tea, like matcha, can have slightly higher caffeine content due to the entire leaf being consumed, but the serving sizes are usually smaller14.
• Green tea also contains the amino acid L-theanine, which can help balance the effects of caffeine, providing a more stable and calm energy boost compared to coffee24.