Egg Yolk and Their Color's Significance

Did you know that the color of food is determined by the nutrients in it?   The same is true for egg yolks, which range from pale yellow to deep orange.  Chickens that eat food high in carotenoids will have more orange coloring. Some farmers are feeding their chickens marigolds, which get their orange and yellow coloring from the carotenoid in the plant.  However pasture chickens get carotenoids from a variety of plants, so they achieve a full profile of the various carotenoids (Beta-carotene, lycopene, xanthophyll and lutein).  Carotenoids can be converted to Vitamin A by the body but need the presence of fat to do so.

Effect of Egg Washing on the Cuticle Quality of Brown and White Table Eggs
Effects on Egg Yolk Colour of Paprika Combined with Marigold Flower Extracts