The Claim

In healthy young women aged 21–25, consuming dinner 1 hour before bedtime for four consecutive days reduces total sleep time by approximately 33 minutes and decreases sleep efficiency by 6.8% compared to consuming dinner 5 hours before bedtime, resulting in increased nocturnal awakenings and disrupted sleep continuity.

Source: Effects of later dinner timing on subsequent metabolic function and nocturnal sleep in healthy young women

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
54score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

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.

See the scientific wording

In healthy young women aged 21–25, consuming dinner 1 hour before bedtime for four consecutive days reduces total sleep time by approximately 33 minutes and decreases sleep efficiency by 6.8% compared to eating dinner 5 hours before bedtime, indicating that late-night eating disrupts sleep continuity and increases nocturnal awakenings.

Why this might work

Eating a meal right before bed causes blood sugar to stay high during the night. When blood sugar drops suddenly while sleeping, the body reacts by waking up briefly many times, which breaks sleep into pieces and reduces total sleep time.

Verified mechanismbased on 1 study

What the research says

1 study
  1. Study: Effects of later dinner timing on subsequent metabolic function and nocturnal sleep in healthy young women

    When young women ate dinner just one hour before bed, they slept less and woke up more during the night compared to when they ate dinner five hours before bed. This shows that eating too close to bedtime can mess with sleep quality.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.