In a stable infant, what percent of kcals should come from fat in PN?

• A. 30-50%
• B. 60-70%
• C. < 30%
• D. > 50%

Answer: (C)

In PN for infants, fats supply essential fatty acids and a major energy source, but the total energy plan for a stable infant prioritizes protein and carbohydrate to support growth while keeping fat modest. Keeping fat calories below 30% of total kcals helps avoid common PN complications in infancy, such as hypertriglyceridemia and cholestasis, while still meeting essential fatty acid needs. So for a stable infant, aiming for less than 30% of total energy from fat aligns with safe, growth-focused PN practice.