Why are eggs white?

Why is there a difference between red and white? It is mainly caused by the difference between chicken breeds and chicken feed. The feed used in large chicken farms contains less pigment and mixed with white fish meal, so the eggshells are mostly white; However, red-shelled eggs are generally born by chickens raised by retail investors, and the feed variety is complex, and the feed contains more lutein, so the eggshell is red. On the other hand, lutein has no nutritional value. Judging from the color of eggshells, red-shelled eggs are more nutritious than white-shelled eggs, which is just a misunderstanding. Nutritionists analyzed the nutrition of red and white shell eggs. The results showed that the protein content of white-shell eggs was 13.02%, and the fat was 1 1.22%. On the other hand, the cholesterol content in eggs is 6. 18% lower than that in red eggs. The vitamin A content of white-shell eggs is 54.4% higher than that of red-shell eggs. The skin of white-shell eggs is thinner than that of red-shell eggs, and the egg white is thicker. Generally speaking, the nutritional value of white-shell eggs is higher than that of red-shell eggs, which is more beneficial to human body. People think that red-shelled eggs are more nutritious than white-shelled eggs, and they also like to pick red shells when buying them. In fact, this understanding is wrong. From a scientific point of view, the nutritional value of red-shell eggs and white-shell eggs is the same.