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误区一:红壳鸡蛋营养好 一些人认为红壳鸡蛋比白壳鸡蛋更富有营养。其实,蛋壳的颜色主要是由一种称为卵壳卟啉的物质决定的。普通母鸡血液中的血红素代谢可产生卵壳卟啉,因而蛋壳呈浅红色,而来航鸡和白洛克鸡不能产生卵壳卟啉,因而蛋壳呈白色,这完全是由遗传基因决定的。鸡蛋营养价值的高低主要取决于饲料的营养结构和鸡的摄食情况。有人分析测定了红壳蛋和白壳蛋的成分,其中几种主要营养素的含量互有高低,相差不大。 误区二:生吃鸡蛋营养好 有人认为吃生鸡蛋有营养,其实,这种看法不对。首先,生鸡蛋的蛋白质结构
Misunderstanding one: red shell eggs nutrition Some people think that red shell eggs more nutritious than white shell eggs. In fact, the color of the egg shell is mainly determined by a substance called egg shell porphyrin. Normal hen blood hemoglobin metabolism can produce egg shell porphyrin, and therefore eggshell was light red, while the flight of chicken and whitelock chicken can not produce egg shell porphyrin, so the egg shell is white, which is entirely determined by the genetic of. The nutritional value of eggs mainly depends on the nutritional structure of feed and chicken feeding. Some people have analyzed and measured the composition of red shell egg and white shell egg, among them the content of several major nutrients each other is high and low, the difference is not big. Misunderstanding two: raw egg nutrition Some people think that eating raw eggs nutritious, in fact, this view is wrong. First, the protein structure of raw eggs