Gastric cancer patients with stage III after total gastrectomy at discharge, if she/he has nutrition risk (NRS2002≥3), then she/he will be randomized to immune nutrition support (INS) or control (C) group after discharge. In the INS group, in addition to diet, and patients will also consume two bottles per day of a high-calorie, high-protein ONS and three capsules of fish oil lasted for 6 months. In the C group, patients will receive normal diet. Both groups will receive nutrition counseling.~The primary and secondary outcomes will be collected.
Gastric cancer patients with stage III will be randomized to immune nutrition support or control group at discharge after total gastrectomy. Patients will receive 6 months of immune nutrition support or normal diet after discharge. The primary and secondary outcomes will be collected.