The Study
Effects of later dinner timing on subsequent metabolic function and nocturnal sleep in healthy young women
This study showed that when young women ate dinner right before bed, they slept less well that night. It doesn't prove that eating late causes long-term problems, but it does show a clear link between timing and sleep quality in this group.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study tested what happens when young women eat dinner just one hour before bed versus five hours before bed.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 554 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — even though they didn’t feel sleepier, their brains showed more disruptions during sleep, which could affect recovery and health over time.
- 2When dinner was eaten 1 hour before bed, women slept 33 minutes less and had 6.8% worse sleep efficiency.
- 3They woke up more often (2.3x more arousals) and their sleep was more jumpy (25.4 more stage shifts per hour).
- 4Glucose levels dipped slightly after a few days, but overall sugar control stayed the same.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Physiological Anthropology
Year
2026
Authors
M. Enomoto, Shingo Kitamura, Taiki Kunieda, Taisuke Eto
Related Content
Claims (6)
Not eating for three hours before going to bed results in better sleep quality.
When healthy women aged 21–25 eat dinner one hour before bed for four days, they sleep 33 minutes less and have 6.8% lower sleep efficiency than when they eat dinner five hours before bed, with more awakenings during the night.
In healthy young women, eating dinner one hour before bedtime for four days does not reduce overall glucose tolerance during an oral glucose tolerance test, although blood sugar levels after eating show short-term fluctuations.
In healthy young women, eating dinner one hour before bedtime changes how blood glucose levels rise after the meal, with a pattern of lower glucose response by the third to fourth day compared to the first day.
In healthy young women, eating dinner one hour before bed is linked to more frequent awakenings during sleep and more transitions between sleep stages compared to eating dinner five hours before bed.
In healthy young women, eating dinner one hour before bed does not change how sleepy or hungry they feel before or after sleeping.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.