People who sleep 5–6 hours or less than 5 hours per night tend to consume less selenium, a mineral important for immune function and reducing inflammation, compared to those who sleep 7–8 hours.
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 selenium intake and short sleep duration exist across multiple prospective studies.
A systematic review and meta-analysis of 15+ prospective cohort studies measuring daily selenium intake (via food records or biomarkers) and objectively measured sleep duration (actigraphy) over 5+ years in adults aged 25–70.
An RCT could determine whether selenium supplementation improves sleep duration in adults with habitual short sleep.
A double-blind RCT of 120 adults with habitual short sleep (<6 h) randomized to 200 mcg/day selenium supplementation or placebo for 12 weeks, measuring sleep duration via actigraphy and serum selenium levels.
A cohort study could determine whether low selenium intake predicts the development of short sleep over time.
A 7-year prospective cohort study of 5,000 adults aged 30–55 with annual dietary assessments (3-day food records) and biannual actigraphy-based sleep monitoring, testing whether baseline selenium intake predicts incident short sleep.
A case-control study could compare selenium intake in adults with persistent short sleep versus those with normal sleep.
A case-control study comparing 300 adults with self-reported short sleep (<6 h) for ≥3 years to 600 matched controls with normal sleep (7–8 h), using validated food frequency questionnaires and serum selenium biomarkers.
A cross-sectional study can confirm whether selenium intake differs between short 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 selenium intake across sleep duration categories.