An NHS GP has warned that failing to brush teeth at least twice daily could increase risks of heart disease and Alzheimer's, highlighting broader health implications. According to Doctor Amir Khan, oral health affects overall health in multiple powerful ways. Gum disease is a chronic inflammatory condition caused by bacteria building up under the gum line, as described by Doctor Amir Khan.
These bacteria can enter the bloodstream and create low-grade widespread inflammation elsewhere in the body, which can drive many chronic diseases. Inflammation from gum disease makes plaques more likely to rupture, increasing the risk of heart attacks and strokes, Khan explained. Oral bacteria have been found in the brains of patients with Alzheimer's disease, according to Khan.
He noted that these bacteria may travel via the bloodstream or nerves to the brain, triggering chronic inflammation and contributing to neurodegeneration over time, though more research is needed on the causal evidence linking oral bacteria directly to Alzheimer's disease progression. Gum disease is closely linked with diabetes, Khan said, describing a two-way relationship: high blood sugar weakens immune response making gum infections more likely and severe, while gum disease increases inflammation and worsens insulin resistance making blood glucose harder to control. Dentists often spot early warning signs of diabetes in the mouth, like persistent gum infections, dry mouth, or slow healing, he added.
Poor oral health could also lead to pregnancy complications, Khan noted.