Time-restricted Eating to Improve Metabolic Abnormalities in Polycystic Ovarian Syndrome

Inclusion Criteria: * Adult women of reproductive age with confirmed diagnosis of PCOS (Rotterdam Criteria, including at least 2 of 3 characteristics: oligomenorrhea, clinical and/or biochemical hyperandrogenism and ultrasound criteria) * No BMI restriction * Able and willing to provide explicit, informed consent Exclusion Criteria: * Type 1 diabetes, medication-controlled type 2 diabetes * Pregnancy * Currently participating in weight loss programme, or reported weight change in last 3 months (\>5% of current body weight) * Documented history of eating disorder * Ovulation medication, such as clomiphene citrate * Weight loss medication affecting weight or appetite in last 6 months, including weight loss medications, antipsychotic drugs or other medications as determine by the physician (eg. Semaglutide, liraglutide, orlistat, amphetamines, Qsymia (phentermine-topiramate), bupropion-naltrexone (Contrave)) * Known liver, renal or thyroid dysfunction (not including non-alcoholic fatty liver disease with hypothyroidism on treatment or subclinical hypothyroidism seen in a large proportion of patients with PCOS) * Unable to participate in follow-up for at least 24 weeks * Unable or unwilling to provide explicit, informed consent