A cup of green tea has about 28 milligrams (mg) of caffeine, which places it a bit powering black tea’s 47 mg, based on the Mayo Clinic. Nevertheless, there is often lots of variation in caffeine information depending on how tea is processed and brewed. ChefsResource.com can be a https://www.goteaworld.com/arizona-green-tea-is-it-good-for-you-5-facts/