New research suggests that bacteria in the mouth and tongue may play a role in changes in brain function as people age. A study led by the University of Exeter found associations between certain bacteria and better memory, attention, and cognitive decline, while others were linked to an increased risk of Alzheimer’s disease.
The researchers identified two possible ways these bacteria impact brain health: direct entry into the bloodstream and altering the balance of beneficial and harmful bacteria. The study found that individuals with certain types of bacteria had improved memory, attention, and ability to perform complex tasks. On the other hand, those with other bacteria were linked to memory problems.
The study’s findings raise an interesting possibility for early identification and intervention. Lead author Dr. Joanna L’Heureux said that routine dental tests could be used to measure bacterial levels and detect signs of declining brain health.
Mild cognitive impairment and dementia risk are common in older adults, with approximately 15% of those over 50 experiencing mild cognitive decline. The study’s results suggest that treatments targeting the balance of bacteria in the mouth may be part of a solution to prevent dementia.
The researchers’ findings also highlight the importance of nutritional habits and lifestyle choices. Eating a balanced diet rich in vegetables, consuming probiotics, maintaining good oral hygiene, and regular exercise can contribute to brain health.
Source: https://scitechdaily.com/scientists-discover-mouth-bacteria-linked-to-increased-alzheimers-risk