Human study · Supplements / medicine · 11 Sept 2026
Deep-sleep loss linked to Alzheimer’s-related protein buildup in new study
Source: Medical Xpress
What the research found
Study. UC Berkeley neuroscientist Omer Sharon and colleagues, directed by Matthew Walker, report in Nature Neuroscience (Sept. 11, 2026) that frontal-cortex tau in cognitively healthy older adults tracks with shorter, less synchronized non-REM slow waves and poorer overnight episodic-memory retention. EEG compared adults in their early 20s with adults in their mid-60s to mid-70s; PET with William Jagust showed tau where traveling slow waves originate. A second cohort’s spinal-fluid tau/amyloid ratios pointed the same way. People did not have clinical Alzheimer’s; memory change was within a normal age range. Association is not proof that tau causes memory loss, and the study does not license a sleep supplement. Educational sleep notes, not a diagnosis.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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