The Short Sleep Study

Exclusion criteria

• . Ever diagnosed with or self-reports a sleep disorder, including sleep apnea, habitual snoring (defined as loud, persistent snoring 3 or more nights per week), insomnia, narcolepsy, or parasomnias.
• . Extreme chronotypes, those who regularly go to sleep prior to 8:00pm.
• . Any current diagnosed or self-reported gastrointestinal disorder, including Crohn's disease, ulcerative colitis, celiac disease, IBS, or functional bowel disorder or chronic heartburn.
• . Regularly wakes up during the night 5 or more times per night for a cumulative amount of 30 minutes as observed via self-report during the screening period, per PI discretion.
• . Currently taking medications (including over-the-counter medications) or dietary supplements that, in the investigator's opinion, may affect the participants' microbiome or sleep.
• . Have taken in the last 3 months medications (including over-the-counter medications) or dietary supplements that, in the investigator's opinion, may affect the participants' microbiome or sleep.
• . Neurodegenerative diseases (including multiple sclerosis, Parkinson's disease, Alzheimer's disease, dementia).
• . Recent history (past year) of alcohol abuse or dependence. Defined as regularly drinking more than 12 drinks for females and more than 20 drinks for males per week and based on PI discretion.