Clinical Uses and Dosages of L-alanyl L-glutamine
Indications for L-alanyl L-glutamine
- Parenteral L-alanyl L-glutamine is primarily indicated for patients who cannot be adequately fed enterally and require exclusive parenteral nutrition 1
- Particularly beneficial in critically ill ICU patients requiring parenteral nutrition, with doses ranging from 0.2 to 0.57 g/kg/day 3, 4
- May improve outcomes in surgical patients, especially those undergoing gastrointestinal surgery, though evidence is mixed 5, 6
Dosage Guidelines
- Standard dosage: 0.5 g/kg/day of L-alanyl L-glutamine dipeptide 1, 5
- For critically ill patients: 0.2-0.4 g/kg/day of L-glutamine (equivalent to 0.3-0.6 g/kg/day of alanyl-glutamine dipeptide) 3
- Typical range in clinical studies: 10-30 g glutamine/24 hours 4
Clinical Benefits and Evidence
- Reduced mortality risk in critically ill patients requiring parenteral nutrition (RR 0.67, CI 0.48-0.92) 4
- Helps maintain plasma glutamine levels, which are often depleted in critical illness 4
- Potentially beneficial for intra- and postoperative glucose-insulin homeostasis and recovery of bowel function after colonic resection 5
Cautions and Contraindications
- High-dose parenteral glutamine is contraindicated in critically ill patients with acute kidney injury or chronic kidney disease 7
- A multicentre RCT showed high-dose glutamine administration in critically ill patients with organ dysfunction was associated with increased mortality 5