Application of Time Restriction Feeding in Patients With Type 2 Diabetes Mellitus

In this 3-week interventional study, the investigators hypothesize that therapeutic Time-Restricted Feeding in patients with poorly controlled Type 2 diabetes mellitus (T2DM) can improve their mean glucose or estimated glycated hemoglobin levels with the same dose, or even reduced dose, of antidiabetics.

Inclusion Criteria: * Age ≥ 18 years and \< 65 years * With the diagnosis of type 2 diabetes * A1c \>= 8.0 on the most recent test in the 3 months before enrollment * Have been on stable antidiabetics in the 3 months before enrollment * OhioHealth Patient Exclusion Criteria: * Pregnant or breastfeeding patients * Severe hypoglycemic episodes (defined as having low blood glucose levels that requires assistance from another person to treat) in the past 12 months * Unable to give informed consent * Currently enrolled in another therapeutic study * Thyroid dysfunction, as defined by abnormal thyroid function test results within the past 6 months * Advanced stage of renal (stage 4 or above) or hepatic (cirrhosis) or respiratory (needs oxygen) or heart failure (NYHA class 3 or above) * Active infection or malignancy * Dementia, or other significant mental impairment that would, in the opinion of the investigator, impede patient self-reporting * Clinician-reported history of patient non-adherence