An egg contains about six grams of protein. Eggs are a good source of high-quality protein, with one large, boiled egg providing 12 percent of a person's daily recommended value of the nutrient. Protein is important for building muscle, maintaining a healthy immune system and for overall good health.
Brown eggs have about the same amount of protein as white eggs. A quail egg, which is much smaller than a chicken egg, has about a gram of protein. Eggs are a popular food because they are nutritious, versatile, and relatively inexpensive. Despite being high in cholesterol, eggs can be part of a heart-healthy diet.