Chocolate Prevents Tooth Decay

Recently I went to the dentist for the first time in ten years. I was very concerned about the state of my teeth given that I have several existing cavities, had not been to the dentist for a long time, and eat a ton of chocolate (nibbling on it too - which is much worse than eating it in a shorter time period).

However, I didn't have a single cavity! So I looked up to see if chocolate is good or bad for teeth and found the following link. In general, chocolate with sugar is better for the teeth than plain sugar (though it is still bad). I'm guessing the caffeine/drying out the mouth effect from dark chocolate is very minimal (saliva is a good thing for your teeth - one of the reasons coffee is bad).

Other than that - did you know that most Americans brush their teeth too hard? This can cause receding gums - which I have on two teeth (but not that bad).

Soft drinks are really bad. The sugar is bad enough, but they can also include acid that really destroys your enamel.


Chocolate can protect against tooth decay, researchers have found.

It is so successful in combating decay that scientists believe some of its components may one day be added to mouthwash or toothpaste.

A study carried out by researchers at Osaka University in Japan found that parts of the cocoa bean, the main ingredient of chocolate, thwart mouth bacteria and tooth decay.

They discovered that the cocoa bean husk - the outer part of the bean which usually goes to waste in chocolate production - has an anti-bacterial effect on the mouth and can fight effectively against plaque and other damaging agents.

Tooth decay occurs when bacteria in the mouth turn sugar to acids, which eat away at the tooth's surface and cause cavities.

It may be possible to use CBH extract in a mouthwash, or supplement it to a toothpaste

Takashi Ooshima, Osaka University

The Japanese scientists found that chocolate is less harmful than many other sweet foods because the antibacterial agents in cocoa beans offset its high sugar levels.

They tested their theory on rats by adding an extract of cocoa bean husk (CBH) to their drinking water. Another group was infected with streptococcus mutans bacteria, which contributes to plaque and tooth decay. They were also fed a high-sugar diet.

After three months, the study found that the rates with the high sugar diet had 14 cavities on average compared to just six cavities for those who received cocoa bean husk in their diet.

The researchers are now planning to test their findings on humans.

Speaking to New Scientist magazine, Takashi Ooshima, from Osaka University, said their findings could lead to new treatments for tooth decay.

"It may be possible to use CBH extract in a mouthwash, or supplement it to a toothpaste."

It could even be put back into chocolate to make it better for teeth, he said.

Good oral hygiene, rather than eating lots of chocolate, is the way to good healthy teeth

David Beighton

David Beighton at the Guy's, King's and St Thomas' Dental Institute in London thinks that the active substances found in cocoa bean husks are also found in other plants, like chewing sticks used in Africa.

"They certainly have effects but good oral hygiene, rather than eating lots of chocolate, is the way to good healthy teeth."

A spokeswoman for the British Dental Association said: "If it's true that chocolate does help reduce dental decay and cavities that can only be a good thing, but you must remember that chocolate contains sugar.

"Our advice remains the same: if people want to eat sugary sweets and drinks they should limit them to meal times, and visit their dentist regularly."