Preliminary Clinical Study of NMN Intervention in Mild Ulcerative Colitis

Inclusion Criteria: 1. Age ≥18 years old, ≤75 years old; 2. Clinical diagnosis of mild active UC patients, the diagnosis standard reference inflammatory bowel disease diagnosis and treatment of the consensus of opinion 2018. 3. Agreed to participate in this study, and sign the informed consent. Exclusion Criteria: 1. Patients with ALT or AST more than 2 times the upper limit of normal, TBIL more than 2 times the upper limit of normal; 2. The creatinine clearance patients less than 60 ml/min. 3. The intestines or other parts have severely active infection patients need to use antibiotics or antiviral drugs; 4. Crohn's disease and intestinal tuberculosis and other chronic intestinal infectious disease, intestinal malignant tumor patients; 5. Pregnancy and lactation women; 6. People with diabetes or screening period more than 7.0 tendency for fasting glucose/L or glycosylated hemoglobin exceed 6.5%; 7. With serious mental illness, such as drugs and alcohol can't cooperate with the patients; 8. Participated in any other clinical investigator within 1 month before the screening period; 9. The researchers determine any other disease or condition is not suitable for patients participate in the study.