# Controversies in Parenteral Protein Intake in Preterm Infants

## TL;DR

This paper discusses the challenges of determining the right amount of protein for preterm infants through parenteral nutrition.

## Contribution

The paper highlights the controversy and uncertainty around optimal protein levels for preterm infants at different gestational ages.

## Key findings

- Introducing protein soon after birth improves short-term growth and neurodevelopment in preterm infants.
- High-protein delivery may have adverse effects on very low birth weight infants.
- Higher levels of specific amino acids can potentially harm the developing brain in infants with metabolic errors.

## Abstract

As the limit of viability is extended to lower gestational ages, neonatologists caring for preterm infants must discover the optimal nutritional combination to support postnatal growth. It has been well established that introducing protein soon after birth is associated with improved short-term growth at 36 weeks postmenstrual age and neurodevelopment. However, it remains unclear what the optimal level of protein is for parenteral nutrition at various gestational ages. Several studies have shown possible adverse effects of high-protein delivery in very low birth weight infants. Inborn errors in amino acid metabolism also caution us that higher levels of specific amino acids can harm the growing brain.