A nuclear magnetic resonance-derived metabolic signature partially mediates the protective effect of healthy sleep on stroke risk through lipid metabolism, amino acid homeostasis, and systemic inflammation pathways, highlighting potential metabolic targets for stroke prevention in individuals with sleep disturbances.
Key Findings
Results
Higher healthy sleep scores were associated with lower incident stroke risk in a large prospective cohort.
Study included 200,729 UK Biobank participants free of stroke at baseline (mean age 56.48±8.10 years, 53.80% female).
Each 1-point higher healthy sleep score (range 0-6) was associated with lower risk of stroke (HR 0.97; 95% CI, 0.95-0.99).
5,140 incident strokes occurred over 2,530,392 person-years during a median 12.6-year follow-up.
The healthy sleep score was derived from 6 behaviors: chronotype, sleep duration, insomnia, snoring, daytime dozing, and ease of getting up.
Results
Elastic net regression identified 35 sleep-related plasma metabolites that together formed a metabolic signature score.
Metabolites were selected from 249 plasma nuclear magnetic resonance biomarkers using elastic net regression.
The 35 identified metabolites mainly reflected lower glycoprotein acetyls and VLDL particles and higher polyunsaturated fatty acids, including DHA and linoleic acid.
The metabolic signature score was derived by combining these 35 sleep-related metabolites into a composite score.
Major metabolite contributors included omega-3 fatty acids, HDL subfractions, amino acids, and GlycA.
Results
Higher metabolic signature scores were associated with reduced stroke risk.
Each 1-SD higher metabolic signature score was associated with a reduced risk of stroke (HR 0.93; 95% CI, 0.90-0.96).
Participants in the highest versus lowest tertile of the metabolic signature score had lower stroke risk (HR 0.86; 95% CI, 0.79-0.93).
Associations were estimated using Cox proportional hazards models.
Results
The nuclear magnetic resonance-derived metabolic signature mediated 8.63% of the association between healthy sleep and stroke risk.
Mediation proportion was 8.63% (95% CI, 3.65%-18.25%).
Mediation was assessed using counterfactual analyses.
Major contributing pathways included lipid metabolism, amino acid homeostasis, and systemic inflammation.
Specific mediating metabolite classes included omega-3 fatty acids, HDL subfractions, amino acids, and GlycA (glycoprotein acetyls).
Results
The metabolic signature reflected specific lipid and inflammatory pathway differences associated with sleep health.
Healthier sleep was associated with lower glycoprotein acetyls (GlycA), a marker of systemic inflammation.
Healthier sleep was associated with lower VLDL particle levels.
Healthier sleep was associated with higher polyunsaturated fatty acids, specifically DHA and linoleic acid.
HDL subfractions were identified as major contributors to the mediation effect.
What This Means
This research suggests that people who have healthier sleep habits — including a regular sleep schedule, appropriate sleep duration, no insomnia, no snoring, no daytime dozing, and ease of waking up — have a lower risk of suffering a stroke over more than a decade of follow-up. The study tracked over 200,000 adults from the UK Biobank for a median of 12.6 years and found that each improvement in a six-component sleep health score was associated with a 3% reduction in stroke risk. Importantly, the researchers also identified that certain blood metabolites appear to explain part of why good sleep protects against stroke.
Using advanced blood testing technology (nuclear magnetic resonance spectroscopy) that measures hundreds of metabolites at once, the researchers identified a 'metabolic signature' of 35 blood markers linked to sleep health. People with healthier sleep tended to have lower levels of inflammatory markers (like GlycA) and harmful fat particles (VLDL), and higher levels of beneficial fats such as omega-3 fatty acids (DHA) and linoleic acid. This metabolic signature was itself associated with an 7-14% lower stroke risk depending on how it was measured, and it accounted for about 8.6% of the overall sleep-stroke relationship.
This research suggests that the protective effect of healthy sleep on stroke risk operates at least partly through measurable changes in blood lipids, inflammatory markers, and amino acids. This matters because it points to specific biological pathways — lipid metabolism, inflammation, and amino acid balance — that might be targeted in people with poor sleep to help reduce their stroke risk. The findings could eventually help identify individuals at elevated stroke risk due to sleep problems and potentially guide interventions, though the mediated proportion was modest, meaning many other mechanisms also link sleep to stroke.
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Xu Z, Zhang J, Fan Z, Zhou H, Zhang L, Hu L, et al.. (2026). Metabolic signatures of sleep health and stroke risk: A prospective cohort study with mediation analysis.. Sleep health. https://doi.org/10.1016/j.sleh.2026.08.008