Just 1 simple change in the daily routine can improve brain function

Our daily habits have a great impact on how our brain functions and small changes can make a big difference. One surprising and simple tweak that can improve brain health and cognitive function is improving the health of your mouth—yes, you read that right!


The community of bacteria in our mouths which is known as the oral microbiome, has been found to have a major impact on brain function. The bacteria majorly impact the decision-making ability or memory power of the brain. According to this study published in 2025, just 1 minor adjustment to oral hygiene could have a positive impact on cognitive function and overall brain function.

Role of oral bacteria in brain function

According to this study, the balance of oral bacteria may have an impact on brain function. In particular, improved memory performance has been associated with bacteria found in healthy oral microbiomes, such as Neisseria and Haemophilus. Nitric oxide, a chemical important for brain function, is produced in part by these bacteria. Maintaining cognitive function depends on the brain receiving oxygen and nutrients, which is made possible by nitric oxide, which improves blood circulation. Therefore, maintaining a healthy bacterial balance in your mouth benefits not just your teeth but also your brain.

Improving your oral hygiene and eating nitrate-rich meals are the two most important changes you can make to improve your brain health. Nitrates that are present in meals such as green vegetables and beets help increase the growth of good bacteria in your mouth. This good bacteria has been related to improved cognitive performance. Consuming these meals on a regular basis, combined with proper oral hygiene, can help to increase nitric oxide production, which improves cognitive processes such as memory and concentration.

The power of regular oral care

Maintaining good oral health isn't just about brushing and flossing—though those are crucial. It's also about supporting the growth of beneficial bacteria in your mouth. Studies suggest that a healthy mouth microbiome can decrease the risk of cognitive decline. Simple actions like brushing your teeth, using mouthwash, and eating foods that promote the growth of good oral bacteria (like those rich in nitrates) are small steps that could lead to a sharper mind as we age.

The link between diet, oral health, and cognitive function

The study also emphasizes that diet and oral microbiome health are interconnected. For example, foods rich in nitrates not only support your oral bacteria but can also improve the production of nitric oxide, which in turn enhances brain function. By simply adding more vegetables and nitrate-rich foods into your diet, you’re giving your brain a natural boost while supporting your oral health.