At this time we do not test our teas for caffeine content. Contrary to popular belief, caffeine content cannot be categorized based on tea type (for example, the idea that black tea contains more caffeine than green tea). Recent studies have shown that the caffeine content of teas can and do vary, sometimes significantly, even among the same type of tea.
It is quite difficult to estimate how much caffeine is in tea because it depends on so many factors. Studies have shown that the amount of caffeine in the tea depends on a number of factors which include the variety or cultivar of tea leaves, the cultivating age, the growing environment, the growing methods, the manufacturing conditions, and the preparation of the actual tea infusion. All of these factors can greatly influence the caffeine level in teas.