BEST TYPE OF PROTEIN
If that wasn't enough, egg whites contain the purest form of protein found in whole-foods. It is so high that nutritionists use them as the standard when comparing other whole-food proteins. Their "biological value" -- a measurement used to determine how efficiently a protein is used for growth -- is 93.7. Milk, fish, beef, and rice respectively have a bio value of 84.5, 76, 74.3, and 64.

The higher the value, the better the protein is absorbed. This is why many bodybuilders include eggs in their diet. When a person eats beef, for instance, all of the protein is not necessarily absorbed and used to rebuild tissue.

Protein is a complex substance, which is why bodybuilding protein supplement makers are constantly trying to refine the quality of their product and why some protein shake brands boast that their protein is made from egg whites. Having said that, each large egg contains 6.3 grams of protein