What is the recommended daily protein intake for stable infant parenteral nutrition?

• A. 2-3 g/kg/day
• B. 0.5-1 g/kg/day
• C. 4-5 g/kg/day
• D. 6-7 g/kg/day

Answer: (A)

Protein in infant parenteral nutrition is about meeting growth needs without overloading immature organ systems. For stable infants, the amount must supply enough amino acids to support ongoing growth and tissue synthesis, while avoiding excess that can burden the kidneys and liver. About 2 to 3 g of protein per kilogram of body weight per day provides a balance: it supports adequate nitrogen for growth and prevents deficiencies, yet stays below levels that increase the risk of azotemia, hepatic fat accumulation, and metabolic complications seen with very high intakes. Providing too little protein (0.5–1 g/kg/day) risks poor growth and undernutrition, while markedly higher amounts (4–5 or 6–7 g/kg/day) are unnecessary in stability and can cause adverse effects. In practice, the exact amount is guided by growth trajectory, labs like BUN, and tolerance, but 2–3 g/kg/day is the typical target for stable infants.