While tea, as a general rule is good for you, very strong tea may not be as much. Tea does contain antioxidants which are beneficial for health, however, consuming large amounts of tea, which contains caffeine, can have a negative impact on health. Caffiene, is of course, a stimulant which in turn can trigger some of the following things such as sleep disruption. Tea also has diuretic properties which can lead to dehydration. As a general rule, a strong tea is not going to cause major health implications, however, it is important to consume everything in moderation. Decaffeinated tea is a great alternative for those who want to have a strong cup of tea (steep for longer or increase the amount of tea) whilst not having higher volumes of caffeine than usual.