All nutrients in the body are important for growth and development in children because they support how energy is produced and how new cells are made to increase muscle and bone size, strength and activity.

• For a food to be used a sole source of nutrition, it should be able to be given to children on its own, rather than as a supplementary food in addition to normal diet. This means that the sole source food has to have enough nutrition to use on its own.

All mammalian milk is made up of three main macronutrients – carbohydrates, protein and fats. The protein in the milk provides amino acids that are used for tissue growth and building up new cells, especially new muscle.