To decaffinate tea or coffee is not an easy process and leaves harmful chemicals behind. It is actually better to drink caffeinated regular tea or coffee than decaffinated tea or coffee.
Unlike in regular, fermented tea, caffeine in green tea does not act like a nerve toxin. The green tea contains all the ingedients and the bulk to keep its active ingedients, such as ceffeine, from having toxic effects. In regular tea, the bulk has been stripped off, and caffeine enters the blood too quickly and in an uncontrolled fashion, bypassing the digestive process. Similar to the caffeine in Guarana, caffeine in green tea is also very beneficial for your health. So enjoy the real thing.