German scientists conducted a study that showed that strong black tea is strictly forbidden to use by anyone who does not want to have health problems.
If you have any slightest suspicions of stomach disease, cardiovascular system, and eye pressure, you should not use strong tea to not worsen the health situation.
Also, do not use too strong black tea due to the fact that it almost completely expels magnesium from the body, and this already threatens with a new bouquet of diseases that a person could not even hear before.
Very often, people make a lot of mistakes in their nutrition and self-destruct their health. This is largely the cause of the development of new diseases. Therefore, in order not to destroy your life with your own hands, you need to read a little and study such a topic as proper nutrition.
And perhaps, it is this behavior that will save you from the oppressive state that is caused when health deteriorates. But for man, there is nothing worse than diseases that appear from nowhere.