Oral health linked to improved brain health: study

Daily habits have a significant effect on brain performance, and minor adjustments may yield considerable benefits.

One such adjustment, according to a recent report by The Times of India, is oral hygiene, which plays a more critical role in cognitive health than previously thought.

The study highlights that oral bacteria, collectively referred to as the oral microbiome, have a direct impact on memory strength and decision-making abilities. Researchers have found that the composition and balance of bacteria in the mouth may influence brain function.

A new study published earlier this year suggests that a single, modest improvement in oral hygiene may positively affect cognitive performance. The presence of specific beneficial bacteria—such as Neisseria and Haemophilus influenzae—was associated with improved memory. These bacteria contribute to the production of nitric oxide, a chemical essential for brain function. Nitric oxide improves blood circulation, thereby ensuring that the brain receives adequate oxygen and nutrients, which are critical for maintaining cognitive abilities.

The findings indicate that sustaining a balanced oral microbiome benefits not only dental health but also mental clarity.

Researchers identified two principal interventions that support brain health: maintaining oral hygiene and consuming foods rich in nitrates. Nitrate-rich vegetables such as leafy greens and beetroot foster the growth of beneficial oral bacteria. These bacteria, in turn, promote nitric oxide production, which supports cognitive functions such as memory and focus.

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Cognitive benefits of regular oral care

Good oral hygiene extends beyond brushing and flossing, though both remain essential. It also involves nurturing the growth of beneficial bacteria in the mouth. Recent studies have linked a healthy oral microbiome with a reduced risk of cognitive decline.

Simple actions—brushing teeth, using mouthwash, and consuming foods that encourage the growth of beneficial oral bacteria—may help preserve sharper mental function as individuals age.

Diet, oral health and cognitive performance

The study further confirms the interrelation between diet, oral microbiota and brain function. Foods high in nitrates not only support a healthy oral environment but also enhance nitric oxide production, which aids brain function.

Incorporating more vegetables and nitrate-rich foods into one’s diet offers a natural means of supporting cognitive health while simultaneously improving oral hygiene.