Egg whites contain only a percent of egg’s fat. They are very low in calorie, cholesterol-free, and packed with most of the egg’s protein. However, most of the micronutrients that are required by the body, is in the egg yolk.  Nature has married the egg white and yolk in a manner that together they provide a complete food. Therefore, it is better to have one whole egg to get complete nutrition. Even, the American Heart Association suggests a full egg per day.