In order to build and repair body tissue, protein is needed. Protein is made up of twenty different amino acids. There are certain essential amino acids that that cannot be produced internally and these must be supplied through food. Within a single egg all twenty amino acids are present.
The bio-availability of the protein found in eggs is rated at 100%. No other food source can compete with this level of bio-availability. Fish meal is rated at 92%, beef at 78% and corn at 54%.