Oral bacteria may predict dementia risk, study finds

New research indicates that bacteria in the mouth may influence brain health and cognitive decline. A study of 115 adults over 50 found that certain bacteria, like Neisseria and Haemophilus, are linked to better memory and attention. Conversely, bacteria associated with gum disease, such as Porphyromonas, were more common in individuals with memory issues. Another group, Prevotella, was linked to lower levels of nitrite, which may indicate poorer brain health. These findings suggest that managing oral bacteria could help maintain brain function as people age. Future research may explore dietary changes and treatments to promote beneficial bacteria and reduce harmful ones.