Intermittent Fasting for the Treatment of Type 2 Diabetes Mellitus

During Phase 1 (Weight Loss), participants will follow a very-low energy diet (VLED; 550-800 kcal/d) 2-3 days per week. On other days, participants do not have a specific kcal goal (non-fasting days). After Phase 1, IER participants will be instructed to follow a VLED 1-2 days per week as needed for weight maintenance.

Participants will eat within an 8-hour period most days (at least 5 days per week). All foods and beverages containing calories will be restricted to this 8-hour period but calorie-free beverages (coffee, tea, diet soda, etc.) are allowed at any time. TRE participants will follow healthy eating guidelines for weight loss during Phase 1 but not follow a specific kcal prescription or restrict intake thereafter.