Effects of Red Ginseng on Gastrointestinal Symptoms and Microbiota After Surgery for Gastrointestinal Cancer

"Step 1. Confrim the inclusion and exclusion criteria to select participants and abtain informed consent before surgery.~Step 2. Before surgery, research nurses randomly assign patients to either the Red ginseng or Control group (single-blind study).~Step 3. Blood tests and stool samples following rectal enema are collected from all patients before surgery.~Step 4. Depending on the type of gastrointestinal cancer (stomach cancer, pancreatobiliary cancer, colorectal cancer), radical resection surgery is performed.~Step 5. From 1 to 4 months after surgery, a three months period is designated for the Red ginseng group to take red ginseng tablets as instructed, with compliance assessements included.~Step 6. Four months after surgery, blood tests and stool samples are collected from all patients.~Step 7. After obtaining samples from the final registered patients, we will commission a contracted institution to conduct microbiome analysis test."