Study Linked Tongue Bacteria to Cognitive Performance
Researchers explored how oral microbial communities might relate to memory and speed in healthy adults.
Updated on Oct. 11, 2026 in Alzheimer’s
Live Poll
Do you believe the bacteria in your mouth significantly impact how well your brain functions?
A study published on October 11, 2026, analyzed data collected between 2017 and 2019 to identify potential links between tongue bacteria and cognitive health. The research examined 60 healthy adults in the UK and Belgium to determine if oral microbes correlate with performance on memory and attention tests.
Why it matters
Understanding how the oral microbiome interacts with cognitive function could offer new insights into healthy aging. This investigation aimed to see if specific bacteria are connected to fluctuations in memory, attention, and processing speed.
This study evaluated 60 healthy, non-smoking adults across two countries through an observational analysis of oral microbial communities and cognitive test scores. While higher levels of Prevotella histicola were associated with faster response times, the findings remain preliminary and require larger, controlled studies to confirm.
The players
University of Exeter
A research university that led this study on the connection between oral microbes and cognitive health.
Vrije Universiteit Brussel
A collaborating institution that participated in the oral microbiome research.
The details
Researchers collected swabs from the tongue, blood, and saliva of participants to map bacterial community composition. They compared these samples against results from standardized assessments measuring memory, attention, emotion recognition, and processing speed. The study identified 17 bacterial species that differed between age groups, with Treponema and Tannerella showing higher abundance in older participants.
Timeline
2017-2019: Data collection period for the study.
- 2026-10-11
Publication date of the new study.
Health Landscape
This research continues to build on the foundations established by the human microbiome project by mapping specific bacterial niches to physiological and cognitive outcomes. It reflects a growing shift toward viewing the body's various microbial habitats as potential markers for long-term health.
While these findings are preliminary, they underscore that age remains a primary factor in cognitive performance. If you have concerns about changes in your memory or attention, these topics are always worth discussing with your doctor to explore evidence-based screening options.
The takeaway
This study suggests that the composition of oral bacteria may vary with age and cognitive performance, though clear biological causation is not established. Keep in mind that lifestyle factors like diet and sleep remain the most well-documented contributors to overall brain health.
Further reading
For more on the latest research into brain health and aging, visit our Alzheimer’s section.
Source note: This article includes information reported by ScienceAlert.
Live Poll
Do you believe the bacteria in your mouth significantly impact how well your brain functions?
