A complete protein (or whole protein) is a source of protein that contains all 8 of the essential amino acids necessary for the dietary needs of humans. Eggs are complete protein.
High biological value of protein is high quality protein. The higher the biological value, the more utilization in the body. Eggs are high quality protein.
Source: Alpha Nutrition Academy
Eggs are excellent sources of animal protein.
Choline helps in nerve signaling, maintenance of cell membranes and is a key part of brain cells.