• New research suggests that the bacteria living in our mouths may influence cognitive function as we age.
• Several bacterial species have been identified as potentially more harmful than others, and some of these microbes may play a role in memory loss and dementia.
• Scientists are now exploring how oral health, along with diet and certain prebiotics, might help slow cognitive decline and protect against conditions like Alzheimer’s disease.

As people age, their memory and thinking skills naturally decline. Approximately 15% of older adults experience mild cognitive impairment, a major risk factor for dementia and other forms of dementia such as Alzheimer’s disease.

Since cognitive decline and dementia are growing public health concerns, scientists are working to better understand the risk factors and find ways to reduce them. One emerging area of research suggests that oral health may play a role in brain health.

Now, a new study suggests that the bacteria living in the mouth may influence cognitive function as people age, with some harmful bacteria possibly contributing to the development of dementia and Alzheimer’s disease.