Restricted Eating Time in the Treatment of Type 2 Diabetes

Who May Qualify: - Age: ≥18 years - Overweight or obesity (BMI ≥25 kg/m2) - T2D with HbA1c\>53 mmol/mol - Habitual eating window ≥12 h/day (incl. foods/snacks and energy-containing beverages) Who Should NOT Join This Trial: - Bariatric surgery or planned bariatric surgery within study duration - Use of fast acting insulin and combination insulin products - Habitual CGM use - A wish to adhere to Ramadan - For women: current/planned pregnancy or lactation - Alcohol or drug abuse (judged by investigator) or treatment with disulfiram - Severe hypoglycaemia within last year (Severe hypoglycaemia, as defined by the American Diabetes Association (ADA), denotes severe cognitive impairment requiring external assistance for recovery) - Inability to understand written and oral information in Danish - Unable or unwilling to adhere to TRE; for instance, due to competing medical conditions. - Medical condition which, based on investigators assessment, challenges participation including but not limited to severe heart, vascular or lung disease, cancer, chemotherapy, psychiatric, gastrointestinal, rheumatic, or endocrine diseases etc. - Concomitant participation in other intervention study - Inability to perform neuropsychological tests (e.g., severe vision and hearing impairment that can-not be improved with aids such as glasses and hearing aids, or language barrier.) Exclusion criteria for the sub-study: - Magnetic resonance imaging (MRI) contraindications based on the MR department's exclusion criteria including pacemaker or other implanted electronic devices, implanted metal objects not compatible to MRI scanning and severe claustrophobia - Participants who do not wish to be informed about accidental findings by MR. Always talk to your doctor about whether this trial is right for you.