Advances in Intermittent Fasting Applications for Critically Ill Patients

Area of Science:

• Critical care medicine
• Nutritional support
• Metabolic research

Background:

• Enteral nutrition is the standard for critically ill patients, supporting immune function and recovery.
• Intermittent fasting (IF), a dietary pattern with extended fasting periods, is being explored as an adjunctive therapy.

Purpose of the Study:

• To review the evidence on intermittent fasting (IF) as a potential adjunctive therapy in intensive care units (ICUs).
• To explore the physiological mechanisms, implementation, clinical outcomes, and safety of IF in critically ill patients.

Main Methods:

• Literature review of current evidence on intermittent fasting in the intensive care setting.
• Analysis of physiological mechanisms, including autophagy, ketogenesis, glucose regulation, gut microbiota modulation, and insulin sensitivity.
• Examination of implementation strategies, clinical outcomes, and safety considerations.

Main Results:

• IF may induce beneficial metabolic responses like autophagy and ketogenesis.
• Potential benefits include improved glucose regulation, reduced intestinal permeability, modulated gut microbiota, enhanced insulin sensitivity, and muscle mass preservation.
• IF achieves these effects without sustained caloric deprivation, differentiating it from prolonged fasting.

Conclusions:

• Intermittent fasting presents a promising theoretical basis for nutritional support in ICUs.
• Further validation of the safety and efficacy of IF in critically ill patients is warranted.
• IF could offer a novel approach to enhance recovery and metabolic health in the intensive care setting.