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National Post published an article that cracking the case of egg yolk colours, from nutrition to taste, and how they came about in the first place.

Unlike shell colour, which depends on the breed of chicken, the hue of an egg yolk is determined by the hen鈥檚 diet.

鈥�(Depending on) the diet makeup, you can have a very wide variety of colour ranges,鈥� egg-splained Louis-Philippe Dessureault, an animal science technician at 9I制作厂免费鈥檚聽Macdonald Campus Farm, which provides eggs to dining services as part of the聽9I制作厂免费 Feeding 9I制作厂免费聽initiative. A diet rich in grains, such as barley, oats and wheat, yields paler egg yolks. At the other end of the spectrum, foraging birds feeding on acorns could lay brown-yolked eggs.