Green tea and black Chinese tea have always been touted as a healthy drink, providing much anti-oxidants. Here is one article which describe what I assume as English tea as the article resides on bbcnews. Here is the link to the article: Tea healthier drink than water
It describe a study by Public health nutritionist Dr Carrie Ruxton and colleagues at Kings College London, and the study is another study on published studies on the health benefits of tea consumption. The study is funded by the Tea Council, but Dr. Ruxton stressed that the study is an independent study.
Here is what the article says. They found clear evidences that drinking 3 or 4 cups of tea a day helps cut the chances of having a heart attack. Some studies also suggested tea consumption provides protection against cancer. It also provide protection against tooth plaque production, and tooth decay, plus it strengthen the bones. (tea contains flouride).
Although there seem no evidence that tea drinking is harmful to health, tea can impair the ability of the body to absorb iron, meaning people prone to anemia should avoid drinking tea near mealtimes.
Public health nutritionist Dr Carrie Ruxton, and colleagues at Kings College London, looked at published studies on the health effects of tea consumption.