The study is a single-center, randomized, single-blinded, controlled trial conducted at ZHUMC's endoscopy unit. It aims to assess the short-term effects of probiotic administration on disease course, quality of life, and nutritional status among patients diagnosed with inflammatory bowel disease (IBD), specifically ulcerative colitis (UC) and Crohn's disease (CD). Patients with UC and CD will be recruited from the endoscopy unit's outpatients and divided into two groups: a control group and an intervention probiotic group. The intervention probiotic group will receive the probiotic intervention for 2 months. During the study period, two visits will be scheduled for all patients. At each visit, medical and nutrition surveys will be filled out, and body composition measurements will be conducted. These assessments will help evaluate the impact of probiotic administration on the participants' disease progression, their quality of life, and their nutritional status. Overall, the study aims to provide insights into the potential benefits of probiotic supplementation in managing IBD and improving the well-being of patients with these conditions.