does black tea have caffeine?

best answer
According to the USDA National Nutrient Database and Journal of Food Science one cup (8 oz.) of black tea contains 14 to 61 mg of caffeine while one cup of decaffeinated black tea contains 0 to 12 mg. In comparison one cup of green tea contains about 24 to 40 mg of caffeine while one cup of grande Starbucks coffee contains about 330 mg.