Time-restricted Eating in Peri- and Postmenopausal Women

Inclusion Criteria: * Healthy women aged 40-58 years * Perimenopausal or recently postmenopausal, \>1 year and \<5 years * BMI \> 30 kg/m2 * Dyslipidemic, defined as the presence of one or more lipid-based cardiovascular disease risk-enhancing factors per American College of Cardiology/American Heart Association guidelines * Normal renal and hepatic function * Perimenopausal women, a negative pregnancy test Exclusion Criteria: Dietary factors: * Diagnosis, or strong clinical suspicion, of eating disorders, including but not limited to, anorexia nervosa, bulimia nervosa, binge eating disorder * Concurrent dietary intervention or modification unrelated to study procedures Psychiatric factors: * Current major depressive episode * Suicidal ideation * Lifetime history of bipolar disorder, psychosis, or other serious mental health problem * Current alcohol/substance use disorder Medical factors: * Use of lipid-lowering or lipid-enhancing medications * Use of systemic hormonal (estrogens and/or progestin) therapies * Use of weight loss medications or supplements * Use of medications that may cause weight loss or gain, unless body weight and medication usage remained stable for at least 6 months * Previous weight loss surgery * Abnormal vital signs at screening visit * Body weight \> 350 pounds, per DXA scan limits * Malignancy within past 2 years * Major surgery within past 3 months * Medical instability considered to interfere with study procedures * Contraindications to DXA scanning * Use of medications that have the potential to cause hypoglycemia (e.g., insulin, sulfonylureas) * Undergoing treatment for cancer * Use of medications for which time-restricted eating would interfere with recommended timing of medication ingestion with food intake. Lifestyle and other factors: * Irregular sleep/wake schedule * Shiftwork * Recent travel across 2 or more time zones * Recent change in exercise habits * Work or social schedules that would impede ability to adhere to study protocol Adherence factors: -Inability to adhere to study procedures completed between screening and randomization visits Off-Study Criteria: * Initiation of new medications for lipid management, weight loss, hormonal medications, or other medications that may cause changes in weight or lipid levels * Development of any significant medical problem * Enrollment in another clinical trial involving study procedures or medications that might interfere with study procedures. * Significant deviation from study protocol or protocol violation * Inability to adhere to time-restricted eating window