Does Yonghe Dawang drink contain caffeine?

Under normal circumstances, a cup of green tea contains about 20 mg of caffeine, and black tea contains about 50 mg of caffeine. A cup of freshly ground coffee contains about 100 mg of caffeine, while the caffeine in instant coffee is about 75 mg. In addition, some special coffees may contain more caffeine. From the health point of view, it is best not to consume more than 300 mg of caffeine every day.