People who sleep less than 5 hours or more than 9 hours per night tend to eat fewer carbohydrates than those who sleep 7–8 hours, including fewer foods rich in lycopene like tomatoes.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A systematic review could determine whether consistent associations between low carbohydrate intake and both short and long sleep exist across multiple prospective studies.
A systematic review and meta-analysis of 20+ prospective cohort studies measuring daily carbohydrate intake (g/day) and sleep duration (actigraphy) over 5+ years in adults aged 25–70, adjusting for BMI, physical activity, and socioeconomic status.
An RCT could determine whether increasing carbohydrate intake alters sleep duration in individuals with very short or long sleep.
A double-blind RCT of 180 adults with habitual very short (<5 h) or long (>9 h) sleep randomized to either a high-carbohydrate diet (55% of calories) or habitual diet for 8 weeks, measuring sleep duration via actigraphy and blood glucose responses.
A cohort study could determine whether low carbohydrate intake predicts the development of very short or long sleep over time.
A 7-year prospective cohort study of 6,000 adults aged 30–55 with annual dietary assessments (3-day food records) and biannual actigraphy-based sleep monitoring, testing whether baseline carbohydrate intake predicts incident sleep extremes.
A case-control study could compare carbohydrate intake histories in adults with persistent very short or long sleep versus normal sleepers.
A case-control study comparing 400 adults with very short (<5 h) or long (>9 h) sleep for ≥3 years to 800 matched controls with normal sleep (7–8 h), using validated food frequency questionnaires to assess lifetime carbohydrate intake.
A cross-sectional study can confirm whether carbohydrate intake differs between very short, long, and normal sleepers at a single point in time.
A nationally representative cross-sectional survey using 24-hour dietary recalls and actigraphy in 10,000 U.S. adults to compare carbohydrate intake across sleep duration categories.