In addition to aloe vera’s ability to reduce inflammation, it also kills certain bacteria, including those that live in the mouth. “Aloe vera may help you in treating cavities because it inhibits the growth of bacteria called Streptococcus mutans, which are mostly responsible for tooth decay,” says Dr. Henry Hackney, a dentist practicing in Chicago and director of content at Authority Dental.
One 2009 study found that aloe vera toothpaste was as effective as two commercially popular toothpastes at controlling several oral bacteria, including S. mutans. However, no research so far has looked directly at whether aloe vera can reduce dental cavities. Still, that doesn’t mean aloe vera doesn’t have something to offer your mouth. “Antibacterial properties of this plant, as well as the multiplicity of antioxidants in it, can help prevent us from developing gum disease, bad breath or various inflammations,” says Hackney.