12 - Eggs

12 - Eggs - Eggs March 22, 2010 Fat content in eggs are...

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Eggs March 22, 2010 Fat content in eggs are associated with the yolk Flax seed is usually fed to hens o Polyunsaturates vary with hens’ feed (C18:3 – linoleic) Cholesterol in eggs is needed for vitamin D, hormone development in eggs Typically, the consumption of eggs has decreased per capita o Around the late 1970s, these values started to plateau, which was when the “Start Cracking” campaign began to increase Egg Composition Shell Colour determined by breed of hen; no effect on quality, cooking properties, or nutritive value Pourous, allowing gas exchange with age Typically washed, thus losing some protective bloom o A thin film of oil is put on to prevent excessive gas exchange pH of egg white is 7.6-7.9 Yolk Good indicator of (1) hen feed, (2) quality, (3) age of egg Feed influences the polyunsaturated composition in yolk and colour o Corn feed = light yellow colour (ithxanthin?) o Intense orange = carontinoids (i.e. in free range hens that ate grass)
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12 - Eggs - Eggs March 22, 2010 Fat content in eggs are...

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