Which eggs can't be eaten? What is the trick of picking eggs? Eggs are rich in nutrition and can supplement a variety of nutrients for the human body, but there are several kinds of eggs that can't be eaten, do you know?
Sticky shell egg: due to the long storage time of this kind of egg, the yolk film becomes weak from toughness. The yolk clings to the eggshell. If the part is red, you can eat it. But if the egg film clings to the eggshell and does not move, it is dark black outside the skin, and has peculiar smell, it is not suitable to eat again.
Cracked eggs: during the transportation, storage and packaging of eggs, due to vibration, extrusion and other reasons, some eggs will cause cracks and cracks, which are easy to be invaded by bacteria. If the eggs are placed for a long time, they should not be eaten.
Moldy egg: when some eggs are drenched or damped, the protective film on the surface of the egg shell will be washed away, which will make the bacteria invade the inner surface of the egg moldy and deteriorate, resulting in black spots on the egg shell and moldy. This kind of egg is not suitable for purchase and consumption.
Yolk scattering egg: due to violent vibration such as transportation, the yolk membrane is broken, resulting in mechanical yolk scattering; or due to long storage time, bacteria or mold invade the egg body through the eggshell pores, damaging the protein structure, resulting in yolk scattering, and the egg liquid is thin and muddy.
If the yellow powder is not serious and there is no peculiar smell, it can still be eaten after high temperature treatment such as boiling, but if the bacteria propagate in the egg body, the protein has been denatured and there is a bad smell, it can not be eaten.
Rotten egg: due to the invasion of bacteria into the egg, the egg will deteriorate, and the eggshell will be black and gray, or even the eggshell will be broken due to the expansion of internal hydrogen sulfide gas, and the mixture in the egg will be gray green or dark yellow, with a foul smell, then the egg can not be eaten, otherwise it will cause bacterial food poisoning.
Stillborn eggs: eggs that are contaminated by bacteria or parasites during the hatching process, as well as poor temperature and humidity conditions, cause the embryo to stop developing are called stillborn eggs. The nutrition of this kind of egg has changed. If it dies for a long time, the protein will be decomposed to produce a variety of toxic substances, so it is not suitable for eating.
In addition, there are diarrhea eggs, blood gluten eggs and so on, which should not be purchased.