The Mind-Mouth Connection: How Oral Bacteria Impacts Your Brain
Story at-a-glance
- Research found that higher levels of harmful bacteria (Prevotella intermedia) in the mouth are linked to cognitive impairment, while beneficial bacteria (Neisseria and Haemophilus) support better brain function
- Nitric oxide production by beneficial oral bacteria plays a crucial role in maintaining blood flow to the brain. Nitrate-rich vegetables help boost the population of these healthy bacteria
- People with the APOE4 gene show a distinct oral microbiome composition. Research shows they have lower levels of Neisseria bacteria and higher amounts of Prevotella, which is associated with increased dementia risk
- Harmful oral bacteria have the ability to enter the bloodstream and cross the blood-brain barrier, leading to brain inflammation that results in cognitive decline
- Maintaining oral health through proper diet, regular brushing and flossing, nose breathing, avoiding antibacterial mouthwash and practicing oil pulling are effective strategies against cognitive decline
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