In PN for a stable infant, which macronutrient is provided at roughly 10-20% of total kcals?

In PN for a stable infant, which macronutrient is provided at roughly 10-20% of total kcals?

• A. Protein
• B. Carbohydrate
• C. Fat
• D. Water

Answer: (A)

In parenteral nutrition for a stable infant, protein is provided at roughly 10-20% of total calories to support rapid growth and tissue synthesis while most energy comes from non-protein calories. Protein supplies essential amino acids needed for growth, organ development, and enzyme production. Infants have high protein needs due to rapid growth, so protein must be enough to support that growth but not so high that it adds unnecessary nitrogen burden or stress on the kidneys. The bulk of energy in PN for infants is provided by carbohydrates and fats, which supply calories efficiently (carbs around 4 kcal/g and fats around 9 kcal/g) and spare protein for its trophic, building roles rather than for energy. Water, while essential, does not contribute kcals and isn’t a macronutrient for energy. So, the correct approach uses protein as a minority portion of total calories, around 10-20%, with the majority of calories coming from carbohydrates and fats to meet energy needs.

In parenteral nutrition for a stable infant, protein is provided at roughly 10-20% of total calories to support rapid growth and tissue synthesis while most energy comes from non-protein calories. Protein supplies essential amino acids needed for growth, organ development, and enzyme production. Infants have high protein needs due to rapid growth, so protein must be enough to support that growth but not so high that it adds unnecessary nitrogen burden or stress on the kidneys.

The bulk of energy in PN for infants is provided by carbohydrates and fats, which supply calories efficiently (carbs around 4 kcal/g and fats around 9 kcal/g) and spare protein for its trophic, building roles rather than for energy. Water, while essential, does not contribute kcals and isn’t a macronutrient for energy.

So, the correct approach uses protein as a minority portion of total calories, around 10-20%, with the majority of calories coming from carbohydrates and fats to meet energy needs.