1. patients aged 18 to 65 years with active CD, as defined by Harvey-Bradshaw Index (HBI) score \>4;
2. patients accompanied with malnutrition as assessed by Nutritional Risk Screening 2002 (NRS2002) score ≥ 3 or Patient-Generated Subjective Global Assessment (PG-SGA) score ≥ 4;
3. patients with high compliance.
You may not be if
1. accompanying with contraindications of enteral nutrition (EN) such as ileus, active gastrointestinal bleeding and shock;
2. severe comorbidities (e.g., Clostridium difficile infection, diabetes, cancer, cardiopulmonary failure and severe liver and kidney diseases;
3. parenteral infection such as urinary infection, pneumonia, etc;
4. steroids or biologicals use within 6 week;
5. intestinal fibrotic stenosis;
6. patients who are pregnant or going to be pregnant;
