Circadian Rhythm
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Weaker circadian “body clocks” in older adults tied to higher dementia risk, study finds
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Older adults with weaker or more irregular daily rest-activity rhythms were more likely to be diagnosed with dementia over about three years, according to a study published in *Neurology*. The research also linked later-afternoon activity peaks to higher dementia risk, though it did not establish that disrupted circadian rhythms cause dementia.
Washington University scientists report that inhibiting the circadian regulator REV-ERBα raised brain NAD+ and reduced tau pathology in mouse models, pointing to a clock-focused strategy worth exploring for Alzheimer’s disease.