An egg is a superb nutritional package and makes a valuable contribution to the diet. Canada's Food Guide to Healthy Eating says eggs may be used in place of meat, as they are an excellent source of high quality protein.
Eggs contain all nine essential amino acids.
Eggs also supply 11 essential nutrients including vitamins A, D, E, thiamin, niacin, and riboflavin plus iron and phosphorus. Eggs are a perishable food and should be stored in their carton in the refrigerator. For every hour eggs are kept at room temperature, they age an entire day. Egg yolk is determined by the diet of the hen and does not affect the nutritional value or quality of the egg. Hens fed a larger proportion of wheat in relation to other components of the diet produce eggs with pale yolks.