What type of tea has the highest caffeine content?

Any tea that you have has some amount of caffeine in it.

Every tea is beneficial to us in one way or another. However, most teas do have specific caffeine content, which is why they are a good source of energy. Using coffee as a fixed comparison of high-caffeine content (150-200 milligrams), black tea, which has 60-90 milligrams of caffeine, has the highest caffeine content of all teas!