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Common foodstuffs and their values: [18] (Note: These values use "whole egg" as a value of 100, so foodstuffs that provide even more nitrogen than whole eggs, can have a value of more than 100. 100, does not mean that 100% of the nitrogen in the food is incorporated into the body, and not excreted, as in other charts.)
two "tenderloin", located on each side between the breast meat and the ribs. These are removed from boneless breasts and sold separately as tenderloins. [18] Leg: Comprises two segments: The "drumstick"; this is dark meat and is the lower part of the leg, the "thigh"; also dark meat, this is the upper part of the leg.
The Difference Between Brown and White Eggs We're not getting into that age-old question of which came first, the chicken or the egg, because in this case one thing is clear: the chicken came first.
Considering nutrient levels in different feeds on a dry matter basis (rather than an as-is basis) makes a comparison easier because feeds contain different percentages of water. This also allows a comparison between the level of a given nutrient in dry matter and the level needed in an animal's diet. [10]
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More than half the calories found in eggs come from the fat in the yolk; 50 grams of chicken egg (the contents of an egg just large enough to be classified as "large" in the US, but "medium" in Europe) contains approximately five grams of fat. Saturated fat (palmitic, stearic, and myristic acids) makes up 27 percent of the fat in an egg. [65]
For hens used in egg production in the US, as of 2011 the FCR was about 2, with each hen laying about 330 eggs per year. [25] When slaughtered, the world average layer flock as of 2013 yields a carcass FCR of 4.2, still much better than the average backyard chicken flock (FCR 9.2 for eggs, 14.6 for carcass). [26]
Poultry meat and eggs provide nutritionally beneficial food containing protein of high quality. This is accompanied by low levels of fat which have a favourable mix of fatty acids. [70] Chicken meat contains about two to three times as much polyunsaturated fat as most types of red meat when measured by weight. [71]