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红皮蛋和白皮蛋 营养究竟差多少?

2017-09-06 06:01:42   中国青年网

人们在买鸡蛋时,往往关注鸡蛋壳的颜色,认为鸡蛋壳的颜色不同,鸡蛋的营养价值不同,甚至有人买鸡蛋专门挑红皮蛋。那么,红皮鸡蛋和白皮鸡蛋,究竟哪个营养价值更高呢?

辽宁省金秋医院营养科营养医师李翠介绍,蛋壳的颜色有白色、红色、棕色等等,其颜色由蛋壳中的原卟啉色素决定,而原卟啉色素的合成能力因鸡蛋的品种不同而不同。有些鸡血液中的血红蛋白代谢可产生卵壳卟啉,蛋壳可呈红色;而有些鸡如来航鸡、白洛克鸡和某些养鸡场的鸡不能产生卵壳卟啉,蛋壳就呈现白色。可以说,蛋壳的颜色是由鸡的遗传基因决定的。

从营养价值上来说,红皮鸡蛋和白皮鸡蛋究竟有何区别的?相关测定结果表明,红皮与白皮鸡蛋蛋白质含量均为12%左右。脂肪含量,红皮鸡蛋略高,为11.1%;白皮鸡蛋略低,为9.0%。碳水化合物两者差别不明显。维生素A和维生素E的含量都是白皮鸡蛋较高,红皮鸡蛋较低。其他营养素含量比较,相差不明显。总体而言,二者营养价值相差不大,百姓可以根据自己的喜好进行选择。沈阳晚报、沈报融媒记者 唐子匀

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