The chicken or the egg?

On average, sedentary people require 0.8 grams of protein per 1 kg of body weight. This works out to about 56 grams of protein a day for a 70 kg (150 pound) person. Those who are physically active or those with greater protein need, such as children, dieters, and the elderly, require more at 1.2 to 1.5 grams of protein per 1 kg of body weight.

One egg provides about 6.25 grams of protein, or about 10% of daily protein needs. Half of the protein in an egg comes from the egg white, while the other half from the egg yolk. In fact, egg protein is of such high quality that it is used as the standard by which other proteins are compared. Eggs have a biological value (efficacy with which protein is used for growth) of 93.7%. Comparable values are 84.5% for milk, 76% for fish, and 74.3% for beef.

The egg is, therefore, an excellent source of protein and one of the best proteins money can buy.