Two days ago, I had a molar removed at my dentist's office. Later, while I was sitting at home with a stiff, swollen face, feeling generally miserable, I began idly browsing for any evidence of preventive measures available to protect against tooth fracture, decay, and loss (the story of my erstwhile molar). Lo, and behold: A study published in the journal Preventive Medicine has provided evidence that certain chemicals in green tea inhibit the bacteria that cause tooth decay and tooth loss.

Catechins, the chemicals in question, occur in four primary variations, and act as antibacterial agents when consumed in green tea. These antioxidants combat oxidative damage from free radicals. While these chemicals (part of a larger chemical class called polyphenols) turn up in other types of tea, such as black tea, the study's authors have found that green tea contains the optimal catechin amounts, 100mg/100ml, to promote oral health.

From a study summary:

Koyama and co-workers analysed data from 25,078 people aged between 40 to 64 years. By measuring tooth loss in people with up to 20 teeth still remaining, the researchers calculated that one to two cups of green tea per day was associated with an 18 per cent reduction in tooth loss risk. The same reduction was calculted for three to four cups per day, while five or more cups was associated with a 23 per cent reduction in risk... The researchers noted that the a certain level of tea was required to produce the effect. This 'threshold' value could be linked to the catechin content of green tea, they added.

This news comes as only the latest in a string of anticipated benefits from green tea. Other health perks from this ubiquitous beverage include apparent protection from dementia, heart-healthy properties, and an edge in the fight against certain cancers.

The verdict seems to be in: Drink green tea for a plethora of health benefits — just don't add sugar!

For more information on this study, see the Discovery News article "Green Tea May Strengthen Your Teeth."