Research
Macro partitioning
Sleep restriction increases the percentage of calories derived from fat during late-night hours (22:00-03:59) compared to daytime and evening hours.
When you are sleep-deprived, you tend to eat more fat during late-night hours. To manage your fat intake, try to avoid eating late at night, especially if you are sleep-restricted.
StrongSupportsHIGH confidence
The percentage of calories derived from fat was greater during late-night hours (22:00-03:59, 33.0 ± 0.08%) compared to daytime (08:00-14:59, 28.2 ± 0.05%) and evening hours (15:00-21:59, 29.4 ± 0.06%; Ps < 0.05).
Why this rating
Randomized controlled trial with objective measurements of macronutrient intake.
Source
Effects of Experimental Sleep Restriction on Weight Gain, Caloric Intake, and Meal Timing in Healthy Adults
Andrea M. Spaeth et al. · SLEEP · 2013
DOI 10.5665/sleep.2792
rct · n=225Cited 446×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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