Cup of tea

Is There Caffeine in Green Tea?

Green tea is a favorite drink for people who like to stay fit naturally. There are various other reasons why people choose green tea, but many choose green tea for its low caffeine content and high antioxidant levels. A few people believe that green tea is completely void of caffeine, but this is not the true.

What is the difference between theine and caffeine?

Theine and caffeine are the same alkaloid, and the caffeine contained in green tea is identical to the one contained in coffee.

The amount of caffeine in green tea varies according to the several factors associated with its production, cultivation and preparation. Depending on the quantity of leaves and the length of infusion, an average cup of green may contain as little as 12mg to 50mg of caffeine, for 5g (1/6 oz.) tea leaves and 500ml (2 cups) water when infused for 3-5 minutes. In comparison, the same amount of coffee contains between 115mg to 290mg of caffeine.

The brewing time while preparing the tea plays a great role in the caffeine level of the green tea. When tea is brewed for a shorter period, it may contain less caffeine; however caffeine is liberated faster during the first minute, but continues to liberate for up to 10 minutes. The number of times the same tea leaves are brewed also has an impact on the caffeine level of the green tea.

Does caffeine in green tea have the same effects as caffeine in coffee?

The caffeine contained in green tea affects the body in a different way, because it interacts with tannins contained in tea which stabilize and attenuate its effects. Tannins contained in tea act as a time-release agent, so the caffeine is absorbed over a longer period of time. This is why the effect of caffeine in green tea is more regular and lasts longer than with coffee.

The caffeine released from the green tea acts differently than caffeine released from other beverages. When consumed in tea, caffeine stimulates the cardiovascular system and the central nervous system by enlarging the vessels in the cerebral cortex. In coffee and in popular energy drinks, caffeine has a direct effect on blood circulation and accelerates the heart rate. In comparison, tea is more a stimulant than an excitant, and it improves the concentration, sharpens the mind, eliminates fatigue and enhances intellectual capacity.

How to remove caffeine from green tea?

For green tea lovers who want to keep their caffeine levels in check, they can use following methods to reduce the amount of caffeine present in the infusion.

  • Flush the caffeine: Pour hot water (not boiling) over the green tea leaves and let infuse for one minute or less. Discard the water. Brew the same tea leaves again at the recommended water temperature and duration and drink the 2nd infusion. This technique removes a good portion of the caffeine content of the green tea, but it doesn't remove it completely.
  • Drink green tea blends: When blended with caffeine-free ingredients like lemongrass, marigold or dried fruits, the resulting infusion will not contain as much caffeine because the quantity used to prepare the infusion contains less tea leaves.
  • Combine these two methods: For optimal results, try to flush the first infusion of a green tea blend.


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