The egg white, also known as albumen, is the clear liquid part of the egg. The yellow part is called the egg yolk. The egg white holds the egg yolk in place. Most of the egg white is water. It is low in calories. They are high in protein. They can be whipped into a foam. The egg white foam is used to make many things like mousse and meringue.
It is rich source of protein without high calorie or fat/cholesterol intake.