Now,scientists have found that there are more than two hundred chemical ingredients in tealeaves and almost 40% of them can be dissolved by water from their long time researching. When we drink tea, we actually take in the water extracts of tealeaves and then they are absorbed by our body. Then it works in many ways. For one thing, it can detoxify water, oral cavity and intestines and make water hygiene enough for drinking. For another thing, it contains a vast of nutrients and medicative components. By some sense it can be as one of medical herbs. Thus, it can have physiological and medical effect on human body. Therefore, tea can be helpful to improve people's health condition. Take my hometown for example,the local people who drink tea as something like eating relatively have lower probability of disease than those who don’t drink. Maybe the taste of tea is not very well like coffee for some people,but it is not bad,too.If you try to drink a cup of green tea,you will find there is a little sweet taste after a second.