Green tea may also ensure that your regular trip to the dentist isn't filled with the dreaded sound of his drill. How? The answer lies within green tea's catechins. Catechins are molecules found within green tea which inhibit the growth of bacteria, specifically streptococcus mutans, the mouth's chief enemy. By drinking green tea, you'll also be proactively decreasing the formation of plaque in your mouth, in addition to combatting cavities and tooth decay.