How much caffeine does tea have?

Despite its negative rap, caffeine in moderation can actually be good for you. It stimulates the nervous system and promotes blood circulation. It also works as a digestive after a heavy or greasy meal. Broken tea leaves (the kind often found in tea bags) have more caffeine than whole loose leaved teas. Depending on how it's brewed, water temperature and steeping time, a cup (5 oz.) of green tea generally has 8-36 mg of caffeine, oolong (12-55 mg.) and red (25-110 mg.). Though coffee has similar amounts of caffeine (Compare to drip coffee (150 mg./5 oz.), and espresso (35 mg./1.5 oz.)), tea has a relaxing effect and can be easily decaffeinated: infuse the tea for about a minute and throw away this infusion. Much of the caffeine in tea is extracted in the first 30 seconds and the subsequent infusions will be basically decaf.