Protein and Carbohydrate Requirements in Children

Introduction to Protein Requirements

The European Society for Paediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN) and the European Society for Clinical Nutrition and Metabolism (ESPEN) recommend that healthy children aged 3-12 years require 1.0-2.0 g/kg/day of protein 1, 2
The American Journal of Kidney Diseases suggests that children aged 1-2 years require 1.05-1.5 g/kg/day of protein 3
The Academy of Nutrition and Dietetics confirms that protein requirements do not need to be increased for vegetarian diets 1, 2

The Current Obesity Reports recommends that children should focus on nutrient-dense foods from every food group, with an emphasis on whole grains, fruits, and vegetables 4
The Clinical Nutrition journal suggests that children aged 2-5 years require 40-45% of total energy from carbohydrates 5

For children aged 1-2 years, the recommended protein intake is 1.05-1.5 g/kg/day 3
For children aged 3-12 years, the recommended protein intake is 1.0-2.0 g/kg/day, with an acceptable range of 10-30% of total energy from protein 1, 2
For adolescents aged 13-18 years, the recommended protein intake is 0.85-1.2 g/kg/day 3

For children aged 2-5 years, the recommended carbohydrate intake is 40-45% of total energy 5
For children aged 5-12 years, the recommended carbohydrate intake is 45-60% of total energy, although this is not directly cited 5

The Circulation journal recommends whole grains, fresh/frozen/canned vegetables, fresh/frozen/canned fruits, and legumes as sources of complex carbohydrates and fiber 6
The Current Obesity Reports suggests lean meats, poultry, fish, eggs, low-fat dairy products, nuts, seeds, and legumes as sources of protein 4, 6

For critically ill children, protein requirements increase to approximately 2.8 g/kg/day to achieve a positive nitrogen balance 1, 2
For children with chronic kidney disease (stages 3-5), the recommended protein intake varies by stage and age, with a range of 0.95-1.35 g/kg/day for stage 3 and 0.95-1.15 g/kg/day for stages 4-5 3
For children with cystic fibrosis, the recommended energy intake is 120-150% of the requirements for healthy children, with 20% or more of macronutrient intake from protein, 35-40% from fat, and 40-45% from carbohydrates 5