Elemental Diet as a Therapeutic Modality: A Comprehensive Review

Area of Science:

• Gastroenterology and Nutrition
• Dietary Interventions
• Clinical Efficacy

Background:

• Elemental diets have been used for over 50 years for various diseases.
• Despite proven mechanisms, their use is limited by palatability, cost, access, and awareness.
• A systematic review is needed to consolidate current knowledge on their formulation, mechanisms, applications, and tolerability.

Purpose of the Study:

• To systematically review the literature on elemental diets.
• To summarize formulation, mechanisms of action, clinical applications, and tolerability in gastrointestinal diseases.
• To identify areas for future research and clinical application.

Main Methods:

• Systematic literature search and review.
• Analysis of formulation variability, mechanisms, clinical applications, and tolerability data.
• Synthesis of evidence from existing studies, acknowledging limitations like lack of large prospective trials.

Main Results:

• Elemental diets demonstrate clinical benefits in eosinophilic esophagitis, inflammatory bowel diseases, small intestinal bacterial overgrowth, and celiac disease.
• Mechanisms include allergen-free content, high absorption, and anti-inflammatory effects.
• High oral intolerance (up to 40%) due to poor palatability is noted, though adverse events are rare when tolerated. Limitations include cost, access, and social restrictions.

Conclusions:

• Elemental diets are potentially highly efficacious for gastrointestinal diseases with minor side effects when tolerated.
• Barriers to use include palatability, cost, access, and social restrictions.
• Prospective clinical trials are essential to define their role in managing specific gastrointestinal diseases.