Inclusion Criteria:  Type 2 diabetes (Group 4 -low-risk group as defined by International Diabetes Federation ) - low-risk group is defined as a well-controlled diabetic patient treated with lifestyle modification and oral anti-diabetic medications The patient was diagnosed with type 2 diabetes before the previous Ramadan. They also had fasted during previous year of Ramadan (2020) and are planning to fast during the coming Ramadan (2021)  Exclusion Criteria:  Patients with poor glycemic control; HbA1c of 8% or more Patients with other serious complications Pregnant, maternal, breastfeeding or pregnant women Patients with severe renal dysfunction (serum creatinine level of 1.5 mg/dl or higher) Patients who advised not to fast by doctor Patients participating in other clinical trials Patients with contraindications to D-allulose