Immunonutrition in clinical practice: what is the current evidence?

Area of Science:

• Clinical Nutrition
• Medical Research Methodology
• Patient Outcomes

Background:

• Previous immunonutrition clinical trials have been small, single-center, and statistically underpowered.
• Existing meta-analyses and systematic reviews highlight limitations in understanding immunonutrition's clinical role.
• Despite reviews, significant questions remain regarding optimal nutrient combinations, dosages, and patient-specific factors.

Purpose of the Study:

• To identify the unresolved questions and limitations in current immunonutrition research.
• To emphasize the need for robust, large-scale, multicenter studies to clarify immunonutrition's clinical application.
• To guide future research directions for evidence-based acceptance of immunonutrition.

Main Methods:

• Review of existing clinical trials, meta-analyses, and systematic reviews on immunonutrition.
• Identification of knowledge gaps concerning nutrient formulations, interactions, and patient variables.
• Proposal for future research designs, emphasizing multicenter, statistically powered trials.

Main Results:

• Current evidence on immunonutrition is insufficient to definitively answer key clinical questions.
• Optimal nutrient combinations, dosages, and administration timing remain undefined.
• Patient-specific factors, including nutritional status and underlying disease, significantly influence immunonutrition efficacy and safety, but are not fully understood.

Conclusions:

• Immunonutrition has potential therapeutic benefits, but its widespread clinical adoption requires stronger scientific evidence.
• Further large-scale, well-controlled multicenter studies are essential to establish the definitive role of immunonutrition.
• Clearer definition of patient populations who benefit from or are harmed by immunonutrition is critically needed.