Feeding preterm infants with L-carnitine supplemented formula

Area of Science:

• Neonatal nutrition
• Biochemistry
• Pediatric research

Background:

• Preterm infants often have altered carnitine metabolism.
• Enteral nutrition strategies require careful monitoring of metabolic status.

Purpose of the Study:

• To investigate the impact of L-carnitine supplementation on carnitine metabolism in preterm infants.
• To assess the effects of L-carnitine on nitrogen excretion and amino acid levels in this population.

Main Methods:

• A randomized controlled study involving 29 preterm infants on mixed enteral nutrition.
• L-carnitine supplementation (600 nmol/ml) for the first seven days in the intervention group.
• Monitoring of plasma and urinary carnitine levels, ammonia, urea, and amino acids.

Main Results:

• Supplemented infants showed increased plasma and urinary carnitines by day 7, with sustained high urinary excretion.
• Elevated urinary carnitine excretion correlated with increased clearance and decreased reabsorption in supplemented infants.
• Supplemented infants exhibited decreased daily excreted ammonia and urea, and lower plasma alanine and glutamine levels.

Conclusions:

• L-carnitine supplementation effectively increases carnitine levels and alters its excretion pattern in preterm infants.
• Supplementation appears to improve nitrogen balance by reducing ammonia and urea excretion.