Human study · Supplements / medicine · 17 Sept 2026
More REM and deep sleep, not just hours in bed, tracked lower disease risk in 95,559 people
Source: EurekAlert
What the research found
Study (observational). Shengzhi Sun of Capital Medical University and colleagues report in PLOS Medicine on 95,559 UK Biobank participants with wrist accelerometers, followed a median 8.9 years against more than 1,000 disease outcomes. Each interquartile extra 47.6 minutes of REM sleep tracked lower risk of 83 conditions, including heart failure (HR 0.74), dementia (HR 0.54), and Parkinson’s (HR 0.20). More deep sleep tracked lower risk of 7 conditions including type 2 diabetes. Total sleep under 5 hours tracked 37 conditions; lowest risk sat in a 6-to-8-hour window. Observational. Educational aging notes, not a sleep prescription.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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