Dietary Impact on Sleep, Rhythms and Related Physiology

Sleep and metabolism are closely interconnected, and emerging evidence suggests that dietary composition may influence both sleep quality and key physiological functions such as glucose regulation, cardiovascular activity, and hormonal signaling. This study aims to investigate how a Western-style unhealthy diet versus a healthier, fiber-rich diet affects objective and subjective sleep measures, 24-hour physiological parameters, and a range of biomarkers related to cardiometabolic, neurodegenerative, and gut microbial function.

NCT Number	NCT07138313
Lead Sponsor	Uppsala University
Conditions	Sleep, Diet Interventions, Circadian Rhythm
Enrollment	24 participants
Start Date	2025-09-22
Primary Completion	2027-07-31 (estimated)
Study Completion	2027-12-31 (estimated)
Updated on ClinicalTrials.gov	2026-02-04