Many people are reluctant when it comes to drinking black tea, because like red wine, it is rich in tannic acid which can stain teeth over time.
On the other hand, researchers from the U.K. claim that drinking black tea may help keep teeth healthy, preventing tooth decay and gum disease. A review of existing studies focused on tea’s ability to combat two types of bacteria:
1. Streptococcus mutans and
The review showed that three to four cups of black tea daily reduced the levels of these bacteria in the mouth. Compounds found in tea and known as flavonoids and catechins appear to reduce inflammation. They actually prevent the growth of bacteria that start a chain reaction with carbohydrates to produce acid, which then dissolves tooth enamel. Similar effects were observed for green tea, which was also found to have the potential to aid weight loss by boosting energy expenditure as well as burning fat.
source: World Tea News