Which type of formula should be used for exclusive enteral nutrition front-line therapy?

• A. Elemental formula
• B. Parenteral nutrition
• C. Gluten-containing formula
• D. Polymeric formula

Answer: (D)

Exclusive enteral nutrition uses a single formula as the sole source of nutrition to rest the gut and promote healing. A polymeric formula is preferred front-line because it provides intact proteins, complex carbohydrates, and fats, delivering complete nutrition with good tolerance and generally lower cost compared with elemental formulas. Evidence supports that polymeric formulas are as effective as elemental ones for inducing remission in inflammatory bowel disease, making them a practical and patient-friendly choice for initial therapy. Elemental formulas are predigested and can be useful when digestion or absorption is severely impaired, but they are often less palatable and more expensive, with no clear advantage for first-line EEN. Parenteral nutrition bypasses the gut and therefore cannot be used for exclusive enteral therapy. A gluten-containing formula isn’t chosen for this purpose because the aim is gut rest and healing with standard polymeric options used in EEN.