Eat in 10 hours, live better? new study tests Time-Restricted eating

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * age: 50-75y old * BMI ≥25 and ≤45 kg/m2 * a diagnosis of prediabetes AND/OR fasting glucose 100 mg/dL and/or HbA1c 5.7% OR Type 2 Diabetes diet-controlled and/or treated with metformin AND meeting 2 or more of the following metabolic syndrome criteria: * diagnosis of hypertension on stable medication regimen * blood pressure \>120/\>80 mmHg * A diagnosis of dyslipidemia on stable regimen * triglycerides 150 mg/dL * HDL cholesterol men \<40 mg/dL and women \<50 mg/dL * waist circumference men: \>102 cm (\>40 in); women \>88 cm (\>35 in) * in possession of a smart phone (iPhone or Android) * 70% of days with logging adherence (2 or more log entries/day separated by at least 5h) * Sleep duration 6-h, with habitual self-reported wake up time \>5AM and before 11 AM and average self reported bed time \<2AM * habitually eat breakfast * with weight stability within 5% of screening for the last 3 months * English speaking (the App has not yet been translated) * must live in the New York City metro area Exclusion criteria: * sleep disorder, e.g. known obstructive sleep apnea (OSA) on CPAP, severe OSA with apnea-hypopnea index \>30 events/h, significant daytime symptoms of OSA, periodic limb movements of sleep, narcolepsy, current shift work or in last 6-mo, travel more than 1 time zone during intervention; severe insomnia with score 15 on Insomnia Severity Index * significant organ system dysfunction/disease: severe pulmonary, kidney or cardiovascular disease; evidence of active illness (e.g., fever) * history of seizure disorder * previous bariatric surgery or on weight loss medication * history of or current significant food intake or psychiatric disorder * use of dietary supplements and/or medications known to affect sleep, circadian rhythms or metabolic function * smoking tobacco or using illegal or recreational drugs * consume excessive alcohol (women: \>14 drinks/wk; men: \>21 drinks/wk) * anemia (hemoglobin \<10 g/dl and hematocrit \<30%) * have conditions that render individual unable to complete all testing procedures \[e.g., unable to stay overnight or frequent travel across 1 time zones\] * extreme early and late chronotypes (\> 2AM bed time and wake up time before 5AM and \> 11AM) * severe food allergies * unwilling/unable to provide informed consent