There are races of chickens that lay white eggs, others with brown peel. Blue or bluish green may be the ones that cause the most strangeness.
When taking a ovo to cook, you may hesitate to look at the egg and notice that the Color of the shell is not the usual.
You can see, for example, an egg with a peel azul or bluish green, You may have the urge to think that it is damaged. Or at least, you will be careful when you leave the shell and start cooking.
But don’t be alarmed: There are even eggs with peels that have different colorss.
The first explanation is in race Chicken: White Leghorn Chickens lay white eggs; Plymouth chickens and Rhode Island Reds lay eggs with brown shell; Araucana, Ameraucana, Dongxiang and Lushi lay blue eggs or bluish green.
It is also a matter of Protoporfirin – An important organic compound in hemoglobin synthesis and other proteins that contain Hemo group. The different colors of eggshells come from the pigments produced by the chickens.
The heme is the compound that gives the blood its red color. The main pigment found in blue egg shells is biliverdin – which also comes from the heme – which sometimes stains eggs with purple and bluish green.
A genetics It also enters this color variation. Example: Brown egg chickens get older, and begin to lay on larger and lighter eggs.
Some chickens races have a dominant gene that causes blue pigment production.
The Britsh Araucana Club adds that the “blue egg gene” is not a natural genetic feature: it was a mutation caused by a retrovirus, Possibly 500 years ago.
Other influential factors: environment, diet and level of stress From the chicken.
Ah, but note that when the egg departs, Inside is all the same. No, the clear is not blue, the gem is not green.
This is to reinforce that, unlike an idea that has been spread, the color of the bark does not influence the content. For example there is the theory that the darker the bark, the healthier the egg. Wrong, warn you. All types of eggs are sources of protein, vitamin D and B12 and good fat.
