Here is how much protein is in egg whites, according to data from the USDA [
1]:
While egg whites are a great source of quality protein, yolks actually contain more protein by weight and make up nearly half of the protein in an egg [
1]. In addition to being a good source of protein, the yolk contains other important nutrients, including essential fatty acids, vitamins A, D, B12, and folate, as well as calcium, phosphorus, and iodine.