Inclusion Criteria:  -Class I obese patients and class II obese patients with no comorbidities  Exclusion Criteria:  Patients with type 3-4 hiatal hernia according to flap-valve grading system Los Angeles type B-C esophagitis Type I-II ulcer Malignant or suspected malignant lesion in stomach Age <18 or >70 Patients use drugs affecting gastric contractility and pyrokinesis Patients have endocrine system problems (hypothyroidism and Cushing syndrome), active psychiatric disorder were not accepted as a candidate for GBI therapy.