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Radiation Exposure May Trigger a Key Feature of Alzheimer's in The Brain

Summary by Science Alert
We're still searching for a root cause of Alzheimer's disease, but scientists are learning more and more about the risk factors involved: old age, primarily, but also genetics, diet, sleep quality, and even pollution in the air we breathe.

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A study conducted in the US has determined that high levels of radiation exposure can trigger the formation of toxic protein clumps in the brain, which are associated with Alzheimer's disease. The study, which examined more than 100 studies, found that every 100 millisieverts of radiation increase raised the risk of dementia by 11 percent.

The Feinstein Institutes for Medical Research in the US have determined that high levels of radiation can activate the eCIRP protein in the brain, triggering toxic tau tangles that lead to Alzheimer's disease. It was found that each 100 millisievert increase in radiation raised the risk of dementia by 11 percent.

Unexpected link between radiation and Alzheimer's: Researchers indicate a possible mechanismAn analysis of over 100 studies indicates a possible link between exposure to ionizing radiation and mechanisms associated with Alzheimer's disease. Researchers say however that most data come from exposures much more ...More ...

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An analysis of over 100 studies indicates a possible link between exposure to ionizing radiation and mechanisms associated with Alzheimer's disease. However, researchers say that most data come from exposures that are much higher than those commonly encountered.

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Science Alert broke the news in Canberra, Australia on Sunday, September 27, 2026.
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