The colour of an egg yolk can not only indicate freshness, it may also tell about the nutritive value of the egg. Interestingly, the different colours of the yolk may also depend on the type of food a hen may have been fed with. That's right! Basically, the intensity of the yellow colour predominantly depends on the natural yellow pigments, known as xanthophylls, which are produced by animals, in this case by hens, which are then deposited in the yolks.(Also read: Have You Been Consuming Stale Eggs? Here Are 4 Easy Ways to Tell)
The colour of an egg yolk can not only indicate freshness, it may also tell about the nutritive value of the egg
Typically, an orange yolk contains more vitamin A and beta carotene. They become orange for the same reason that carrots, also high in beta carotene, are orange. This color change and improved vitamin content is directly related to the quality of food the hen consumes.
Typically, an orange yolk contains more vitamin A and beta caroteneAs a matter of fact, the shell of the egg also determines the exposure it has got. Although shell colour is mainly determined by genetics, the effect of strong sun and high temperatures on the hens can produce a fading effect on the shells. Too much sun affects the surface pigmentation, thereby making them look pale. A bright white shade is an indication that the egg is fresh and not stored for a number of days.
Basically, the colour of the egg yolk does not tell if the egg is fresh or not. The colour of the yolk completely depends on the diet a hen has been given, a healthy hen will produce eggs that have a brighter egg yolk.