The egg is made of protein and the yolk. Yolk contains proteins, but also fats and cholesterol. Fats contained in the yolk, mainly polyunsaturated and therefore harmless. The protein consists of 90% water, 10% of the proteins contain no cholesterol and is substantially free of fats. Chicken egg 97% absorbed by the body. The egg contains 12 vitamins. It is a good source of active vitamin A, and only fish oil yields the content of vitamin D. In the egg rich in vitamins B1, B2, E, as well as the very important vitamin — Choline, which is nowhere as much as in the yolk. 96% Eggs contain minerals, especially high calcium and phosphorus, iodine, copper, iron, and cobalt.