Inclusion Criteria:  Histologically or cytologically confirmed colorectal adenocarcinoma patients after curative surgery without post-operative chemotherapy (stage I and low-risk stage II) Male of female participants over the age of 19 Eastern Cooperative Oncology Group (ECOG) performance score 0-2 Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form and in this protocol Adequate hematologic and end-organ function  Exclusion Criteria:  Patients with temporary/permanent stoma after surgery Diagnosed with locally advanced stage (more than high-risk stage II) colorectal cancer which require postoperative chemotherapy after surgery Diagnosed with metastatic stage IV colorectal cancer after surgery Uncontrolled diabetes (glycated hemoglobin A1c (HbA1c) > 8.0 g/dl) Active infection requiring antibiotics, antifungal or antiviral agents or received a course of antibiotics within 4 weeks prior to study treatments Known history of food allergy Known history of uncontrolled intercurrent illness including but not limited to: Infection/inflammation; severe liver dysfunction; bilateral interstitial lung disease; uncontrolled kidney disease; clinically significant (active) cardiovascular and pulmonary disease; hemorrhagic disease; inflammatory bowel disease, intestinal obstruction; Inability to swallow food; social and psychological problems etc.) Other medical and psychiatric conditions that would prohibit the understanding or rendering of informed consent which affect study compliance