Inclusion Criteria:  Age over 18 years BMI equal to or greater than 27.5 kg/m2 T2DM duration ≤ 10 years Using insulin, or HbA1c ≥ 7.0% while taking diabetes medication C-peptide level higher than 1.0 ng/mL Presence of type 2 diabetes fulfilling the following criteria Consent to not become pregnant for at least 1 year after surgery Willingness to provide voluntary informed consent  Exclusion Criteria:  Presence of uncontrolled severe gastroesophageal reflux (LA classification C or more in esophagogastroduodenoscopy) History of previous metabolic surgery for T2DM History of gastrointestinal surgery, such as gastrectomy or anti-reflux surgery, which may affect the result of metabolic surgery Therapy regimen of more than 3 psychiatric drugs owing to poorly controlled psychiatric disorders Suicidal attempts within the last 12 months Treatment for alcohol and drug abuse within the last 12 months Vulnerability factors (lacking mental capacity, pregnancy or planning of pregnancy, lactation) Unsuitability as per the discretion of the researcher