Inclusion Criteria:  Adult aged 18 years or above； A confirmed diagnosis of gastric cancer (stage I-III)； Completed primary cancer treatments including surgery, chemotherapy and/or radiotherapy； Currently free of cancer； Able to read, write and speak Mandarin.  Exclusion Criteria:  Unable to eat orally； With poor performance status as determined by the Eastern Cooperative Oncology Group (ECOG) scores ≥ 2; With poor cognitive status as determined by the Montreal Cognitive Assessment 5 minute Test <11; Taking part in other dietary interventions or under regular follow-up by a dietitian.