From Bedtime to Bacteria: A Sleep Extension Pilot Study Revealing Gut-Linked Pathways

From Bedtime to Bacteria: A Sleep Extension Pilot Study Revealing Gut-Linked Pathways

Alvin Sherman Library

While the gut contains trillions of bacteria that influence the immune, nervous, and endocrine systems, its implications in health interventions and wellness are often underappreciated. Lifestyle factors, including sleep duration and quality, influence gut microbiome composition and are linked to adverse health outcomes. While sleep extension is known to benefit health, emerging evidence suggests the gut microbiome and inflammatory pathways may help clarify these underlying mechanisms. This pilot study examined the effects of a two-week sleep extension on the gut microbiome composition in healthy adult females as part of a larger investigation of sleep, stress, and systemic inflammation. Participants completed two weeks of baseline monitoring followed by two weeks of extended sleep, during which objective time in bed and total sleep duration significantly increased. Pre- and post-intervention assessments included stool sample collection for microbiome profiling. Although gut microbiome diversity remained unchanged, there was a significant increase of Peptostreptococcus, a genus producing short-chain fatty acids and the tryptophan metabolite indoleacrylic acid (IA), both of which support gut barrier integrity and modulate inflammation. These findings suggest that short-term sleep extension influences specific microbial taxa, highlighting the gut's role in mediating sleep-related health outcomes and its potential for guiding future gut-targeted interventions.