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“Two-thirds of the world population could be at an increased risk of Alzheimer’s due to the presence of common stomach bacteria.”

In a recent study featured in Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association, researchers from McGill University have delved into the potential link between Helicobacter pylori (H. pylori) infection and the risk of Alzheimer’s disease in individuals aged 50 and older. This prevalent infection, known for causing digestive issues and even stomach cancer, is now under scrutiny for its potential role in Alzheimer’s risk.

The study, analyzing health data from over 4 million individuals aged 50 and above in the United Kingdom from 1988 to 2019, uncovered a significant finding. Individuals with symptomatic H. pylori infection were found to face an 11% higher risk of developing Alzheimer’s disease, the most common form of dementia.

While Alzheimer’s disease has complex causes, this research adds a valuable piece to the puzzle, suggesting that infections, particularly H. pylori, may contribute to its development. These findings raise intriguing questions about whether eliminating this bacterium could serve as an effective preventive measure for Alzheimer’s disease in certain individuals.

The implications for Alzheimer’s disease are substantial, considering its global impact. With dementia numbers expected to triple in the next 40 years due to an aging population, effective treatment options remain limited. Dr. Paul Brassard, the senior author of the study and a Professor in McGill’s Department of Medicine, expresses hope that these findings will not only enhance our understanding of H. pylori’s potential role in dementia but also pave the way for proactive prevention strategies. Personalized eradication programs could play a vital role in reducing infections at the population level, offering a hopeful approach to Alzheimer’s disease prevention.

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