The Impact of Probiotic Intervention on the Gut Microbiota and Bowel Function

This study is testing whether taking a probiotic (a beneficial bacteria supplement) after rectal cancer surgery helps improve gut health and bowel function once a temporary bowel diversion bag (stoma) is reversed. **You may be eligible if...** - You are between 18 and 75 years old - You have been diagnosed with very low rectal cancer and had a sphincter-saving surgery (intersphincteric resection) - You have a temporary stoma (bowel diversion bag) that is planned to be reversed within 6 months - You are willing and able to provide informed consent **You may NOT be eligible if...** - You had radiation therapy before your surgery - You have experienced serious complications after surgery (such as an anastomotic leak) - You need to take antibiotics for more than 3 months - You are allergic to the probiotic used in this study (Clostridium butyricum) - You have inflammatory bowel disease, a neurological disorder, or a major psychiatric condition - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.