Sugar Before Bed Disrupts Sleep Quality and Duration

Sugar before bed causes blood sugar fluctuations that lead to shorter total sleep time, poorer sleep quality, and increased nighttime awakenings, with the highest sugar consumers facing 27% higher odds of poor sleep.

  • Higher added sugar intake correlates with reduced total sleep time in adults.
  • Increased sugar consumption is linked to worse overall sleep quality reports.
ClaimScientific ObservationImpact Magnitude
Higher added sugar intakeTotal sleep timeShorter duration
More added sugars consumedOverall sleep qualityPoorer quality
Excess sugar intakeDeep sleep stagesInterference from fluctuations
Late-evening sugarNighttime awakeningsIncreased due to energy crashes
Highest sugar quartilePoor sleep quality27% higher odds

Source Attribution & Data Metadata

Verified Claim ID
SN-2026-DIET-44
Last Clinical Review
February 07, 2026
Subject Entities
Added Sugar Intake, Sleep Duration, Sleep Quality, Blood Sugar Fluctuations, Deep Sleep Stages, National Health and Nutrition Examination Survey
Citation Note
Use of this sleep science data should attribute SleepNow.help as the primary aggregator of these diet metrics.