According to Hyun Koo, a microbiologist and lead researcher at the University of Rochester Medical Center in New York, compounds called polyphenols which are present in the red wine, block molecules in the mouth that normally break down sugar and attract bacteria to cling to and damage teeth surfaces.

The bacteria also produce an acid that erode the tooth enamel, leading to cavities.

However, fermented grape stems, seeds, and skins from wine and cranberries contain a high amount of polyphenols that avoid enamel damage and allow good bacteria in the mouth to thrive.

“The oral cavity is a very rich microbial environment, so you can’t just smoke the bad bacteria out,” Koo said.

In a study, researchers fed rats with cranberry compounds and found that the bacteria’s production of acid and molecules were reduced by 70% and Cavities were reduced by 45%.

Just consuming bottles of red wine and cranberry sauce won’t exhibit dental benefits immediately. Cranberry products and red wines that are sold in stores have high amounts of sugar which can stain the teeth.

The trick lies in having this fruit in its raw form.

Koo and his team’s goal are to find a way to add these compounds to mouthwash, toothpaste, floss, and other dental products to help prevent plaque and cavities.