Share

Our brain, heart and gut—each with their own ‘mind’ are deeply intertwined, sending vital signals to one another to maintain our health. Emerging research now adds the mouth to this circle, showing how oral health may significantly influence brain well-being, including the risk of Alzheimer’s disease.

A growing body of evidence links gum disease to cognitive decline. A systematic review of 16 studies found that the presence of oral bacteria in the brain increased Alzheimer’s risk over ten-fold; one specific microbe, Porphyromonas gingivalis, posed almost a seven-fold risk.

Another review reinforced that periodontal pathogens and the inflammation they trigger could cross from the mouth into the brain, fuelling neuroinflammation and the pathological hallmarks of Alzheimer’s.

Researchers at the Forsyth Institute demonstrated how oral bacteria can dysregulate microglial cells—the brain’s plaque-clearing defenders—leading them to overeat amyloid plaques instead of removing them effectively.

In a landmark experiment, scientists detected P. gingivalis and its toxic enzymes in the brains of over 90% of Alzheimer’s patients. Targeting these enzymes reduced neurodegeneration, suggesting a new treatment frontier.

In Australia, the Florey Institute and the University of Melbourne’s Women’s Healthy Ageing Project are among those leading dementia prevention research, highlighting the importance of early lifestyle action.

Islam has emphasised oral hygiene for over 1400 years. The Prophet Muhammad (s) said:

“If it were not that I might cause hardship to my ummah, I would have commanded them to use the miswak at every prayer.” (Hadith: Sahih al-Bukhari, Muslim)

Using the miswak, a natural teeth-cleaning twig, removes plaque, reduces harmful bacteria, freshens breath, and is now supported by dental studies for its antimicrobial benefits.

Dietary & lifestyle recommendations for oral and brain health:

  • Limit free sugars (in sweets, juices, processed foods) to prevent bacterial overgrowth and gum inflammation.
  • Increase fibre-rich plant foods—raw vegetables, leafy greens, apples, celery—naturally clean teeth surfaces and stimulate saliva.
  • Include omega-3 rich foods (salmon, sardines, chia, flaxseeds, walnuts) to reduce inflammation that can affect gums and brain tissues.
  • Ensure adequate vitamin D & calcium (from dairy, fortified plant milks, eggs, sun exposure) for strong teeth, jaw bone, and nerve function.
  • Add polyphenol-rich foods (green tea, black tea, berries, pomegranate) which combat harmful oral bacteria.
  • Avoid frequent snacking, it lowers mouth pH and promotes bacterial growth; instead, opt for balanced main meals.
  • Drink plenty of water, preferably fluoridated where available, to keep mouth tissues hydrated and wash away food particles.
  • Consider probiotic foods (yoghurt, kefir, fermented vegetables) to support the oral gut–brain microbiome connection.

Regular brushing (or miswak), flossing, and balanced nutrition, rooted in both modern science and Sunnah, create a strong defence not only against gum disease but also against the inflammation that could threaten brain health.

Try to make a habit, whenever you eat anything during day, make sure to rinse the mouth with plain water.

Keep regular dental check-ups for early detection of gum disease.

By nurturing our oral health with both science-based and Sunnah-guided habits, we protect our mind, heart, gut and mouth, living in harmony with the trust Allah has given us.

 

Share