When you think of probiotics, the first thing you probably think of is gut health, but recent studies show that probiotics can also have a major positive impact on oral health. It makes sense, since the oral cavity is part of the digestive system. Naturopathic doctors (NDs) will often suggest the consumption of probiotics and foods rich in other dental-friendly nutrients in order to treat and prevent oral diseases like gingivitis, tooth decay and periodontitis, as well as to improve overall oral health.