having one of the following chronic diseases that maybe impacted by the diet changes: type 1 and 2 diabetes mellitus, cancer, cardiovascular diseases, hypertension, thyroid dysfunction, hepatic/renal impairment, inflammatory bowel disease and other gastrointestinal diseases,
report use of nicotine, thyroid medications, antidepressants, or anti-anxiety medications, melatonin
having clinically diagnosed sleep disorders
alcohol intake exceeds two drinks per day
clinically diagnosed or undiagnosed eating disorders
division-1 student athletes
pregnant or lactating or plan on getting pregnant within 6 months
report major ambulatory disorders,
recently (within the past two weeks) engaged in caloric restriction, timing-based dietary changes, weight loss regimens, or adhered to specialized diets such as ketogenic or paleo diets,
required to take medication with food, as these factors may interfere with sleep and physical activity outcomes or pose risks to participant health during restricted eating protocols. Students whose habitual eating time windows are \<10 hours will also not be eligible.
