Nutrition in Inflammatory Bowel Disease: Strategies to Improve Prognosis and New Therapeutic Approaches.

Inflammatory Bowel Disease (IBD), encompassing Crohn's disease (CD) and ulcerative colitis (UC), is a chronic inflammatory condition of the gastrointestinal tract that significantly impacts nutritional status. Malnutrition is a frequent complication, resulting from reduced nutrient intake, malabsorption, and increased metabolic demands due to chronic inflammation. A comprehensive nutritional assessment encompassing anthropometric, biochemical, and dietary evaluations is crucial for informing personalized interventions. Several nutritional approaches have been explored to modulate inflammation and the gut microbiota, yielding promising results. The Mediterranean, anti-inflammatory, and low-FODMAP diets have shown potential benefits in symptom control. In contrast, diets high in ultra-processed foods and saturated fats are associated with worsened disease activity. Additionally, stool consistency, assessed using the Bristol Stool Scale, serves as a practical indicator for dietary adjustments, helping to regulate fiber intake and hydration strategies. When dietary modifications alone are insufficient, nutritional support becomes a critical component of IBD management. Enteral nutrition (EN) is preferred whenever possible because it maintains gut integrity and modulates immune responses. It has demonstrated efficacy in reducing postoperative complications and improving disease control. In cases where EN is not feasible, such as in intestinal obstruction, severe malabsorption, or high-output fistulas, parenteral nutrition (PN) is required. The choice between peripheral and central administration depends on treatment duration and osmolarity considerations. Despite growing evidence supporting nutritional interventions, further research is needed to establish standardized guidelines that optimize dietary and nutritional support strategies in managing IBD.