[Chronic inflammatory bowel diseases and nutrition]

Area of Science:

• Gastroenterology
• Nutrition Science
• Immunology

Context:

• Inflammatory bowel disease (IBD) etiology is unclear.
• The role of nutrition in IBD is debated, despite observed correlations between dietary changes and IBD incidence.
• Current dietary therapies focus on nutritional support and inflammation reduction through bowel rest.

Purpose:

• To review the current understanding of nutrition's role in the etiology and therapy of inflammatory bowel disease.
• To evaluate the efficacy of different nutritional interventions, including parenteral and enteral nutrition, in managing IBD.
• To identify gaps in knowledge and areas for future research regarding nutritional strategies for IBD.

Summary:

• Parenteral nutrition is recommended for severe ulcerative colitis or malnourished Crohn's patients with complications.
• Enteral nutrition shows higher remission rates in Crohn's disease (up to 80%) compared to ulcerative colitis (25%), but is less effective than standard drug therapy for active Crohn's disease.
• Combined nutrition and drug therapy is considered optimal; evidence for specific formula diets or supplements is lacking.

Impact:

• Highlights the limited but specific roles for nutritional support in IBD management.
• Underscores the need for further research into specific dietary factors and novel nutritional therapies for IBD.
• Informs clinical practice regarding the judicious use of nutritional interventions in IBD patients.