The properties of eggs from hens depend on food and life that is in it. The best are organic eggs since they are significantly healthier. Each component has different egg.
In the yolk is where you can find most of the components. Here you can find minerals, proteins, lipids and vitamins from the egg. The egg yolk with a deeper color should be the type of food they have received; this is usually pigmented with corn, vegetables and other foods of the hen. It is not true that eggs have a more intense color have had a natural breeding, as has been believed for many years.
The clear however is a protein-saline solution. This is a very viscous and transparent. The nutritional value it has is much smaller than the yolk.
The egg, when you put the chicken has a permeable surface and covered with a gelatinous layer serves to prevent germs from entering the egg. It is advisable to wash eggs. The color varies depending on the race that has put the hen and has nothing to do with the pigmentation of the egg shell type power incurred by the animal.