Oral Supplementation of Glutamine on Gastric Cancer Patients After Gastrectomy

This will be a double-blind, randomized, and placebo-controlled study. At least 80 evaluable patients who are scheduled for gastrectomy for gastric adenocarcinoma cancer will be randomly assigned to the control or treatment group. Each group will have at least 40 patients. The CT scan will be evaluated before surgery and on postoperative day (POD) 90. Moreover, the patient will wear the smart watch to record daily walking steps. Laboratory data will be check before gastrectomy and on POD 90.