Thursday, February 25, 2010

is this a yolk?

egg yolks. i received a request to post info on the color of egg yolks and why some yolks are yellow and some yolks are golden. to keep it brief, the easy answer is ➙ the diet of the hen. yolk color can be manipulated, if the farmer chooses, by giving the hens special feed.

here is a short essay on the topic: The type of food a chicken eats largely determines the color of the egg yolk. Yellow orange plant pigments called xanthophylls found in chicken feed determine the yolk color. Yellow corn mash and alfalfa meal will produce medium yellow egg yolks. Wheat or barley produce lighter colored yolks.  Bright yellow marigold petals added to feed will enhance the color of the yolk. A white cornmeal diet will produce egg yolks that are almost colorless.

Egg yolks are one of the few foods that naturally contain Vitamin D.

Occasionally, a hen will produce a double-yolked egg. It is rare, but not unusual, for a young hen to produce an egg with no yolk at all.

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2 comments:

Anonymous said...

Very interesting. I knew that their feed affected color and nutrients, but not which feeds did what.

Your friend Wendy babysat for us last night and told me about you. We are fellow foodie writers! ;) I'm in culinary school and blogging about it, among other things.

Hope we get to chat more...you sound like a fascinating person! (Molecular biology? Really???)

Little Rock Bites said...

welcome arfoodie & thank you for following LRB!