+ Does the tea contain any caffeine? May 09, 2019 05:47 Follow Yes, Morning Boost contains caffeine - this is due to Green Tea, Yerba Mate, Guarana. The caffeine content is ca. 70% of a cup of coffee. Related articles + Can I add milk/sugar to the tea? + Can I drink 'Night Cleanse' every night? + Are there any side effects? + How long should I consume the tea to get the best result? + Can I prepare my tea and leave it in the fridge for tomorrow?