Better objective sleep quality is associated with higher gut microbiota richness in older adults

This study examined the link between sleep quality and gut microbiota diversity in 93 older adults in Taiwan. Researchers assessed subjective sleep with the Pittsburgh Sleep Quality Index (PSQI) and objective sleep using actigraphy. Stool samples were analyzed for microbiota composition. Better objective sleep quality was significantly associated with higher gut microbiota richness (p = 0.02, η² = 0.20), but subjective sleep quality had no effect. The study was cross-sectional, meaning causality cannot be confirmed. Limitations include small sample size, focus on a Chinese population, and lack of polysomnography for detailed sleep architecture analysis. Findings highlight the gut-brain axis, suggesting potential interventions for better sleep and gut health in aging populations.

Maintain consistent sleep patterns and practice good sleep hygiene to support microbiota diversity. A fiber-rich diet with fermented foods may enhance gut health and sleep quality. Exercise also helps regulate the gut-brain axis. However, since this is a cross-sectional study, causation remains unproven. Individual microbiota responses vary, so a holistic approach combining sleep, diet, and exercise is recommended while awaiting further longitudinal research.