Oral microbiome testing, which analyzes the bacteria and fungi present in the mouth, is emerging as a significant tool for understanding overall health and potential disease risks. These tests, using a simple saliva sample, can provide insights comparable to gut microbiome analysis but with greater accessibility.
Dr. Victoria Veytsman, a New York City-based cosmetic dentist and founder of the oral beauty brand Rose Code, explained that these tests examine the microscopic ecosystem of the mouth. "While most oral microbiome tests drive purely wellness insights, the test has the potential to identify high risk pathogens that are infamous for driving disease both inside the mouth and throughout the body," she told the Daily Mail. She likens the process to a DNA ancestry kit, but for the mouth's microbial environment.
The analysis sequences the genetic material of microorganisms in saliva. While bacteria in the mouth are directly linked to oral health, they also influence the gut, respiratory, immune, and cardiometabolic systems. The oral microbiome can also serve as an indicator for women's health and fertility.
Studies have suggested links between specific oral bacteria and serious health conditions. For instance, the bacteria P. gingivalis, often found in the mouth, has been associated not only with gum disease but also with Alzheimer's disease and rheumatoid arthritis. Other oral bacteria have been linked to adverse pregnancy outcomes and certain cancers, including pancreatic, breast, and colorectal cancers.
For individuals who take their oral hygiene seriously, the results of these tests can offer a surprising reality check. One individual, who diligently brushes, flosses, and undergoes regular dental cleanings, discovered the presence of fusobacterium nucleatum, eikenella corrodens, and capnocytophaga species in their mouth. Fusobacterium nucleatum is primarily linked to gum disease, colon cancer, Alzheimer's, inflammatory bowel disease, rheumatoid arthritis, and preterm birth. While the presence of these bacteria does not guarantee disease development, their increased levels, particularly with gum inflammation, can allow them to enter the bloodstream and potentially travel to other parts of the body.
"The mouth is not just a window to overall health, but I believe it is a lever that can be adjusted that can have real measurable downstream effects," Dr. Veytsman stated. She elaborated that inflamed gum tissue, characterized by a "leaky mouth" similar to "leaky gut," can allow pathogens to enter the bloodstream directly. Eikenella corrodens is often associated with periodontal diseases and rare heart infections, while capnocytophaga species have been linked to ocular and respiratory tract infections.
Beyond identifying specific bacteria, oral microbiome tests can also assess genetic predispositions. One test revealed an immediate risk for interleukin-6 production, a protein indicating a genetic predisposition for inflammation (CG-genotype), placing the individual in an intermediate risk category for immune system inflammation. Chronic inflammation is considered a root cause for gum disease and a contributing factor for certain cancers and neurodegenerative diseases.
Dr. Veytsman recommends oral microbiome testing for individuals interested in longevity and preventative health, especially those with a history of unexplained cavities, dental work issues, persistent bleeding gums, or halitosis. It is also advised for those with a personal or family history of cardiovascular disease, autoimmune conditions, or Alzheimer's disease. While not yet a standard part of every dental checkup, these tests are becoming more accessible through direct-to-consumer companies.