Eggs occupy a large part of our daily diet. Many people eat an egg almost every day. Eggs are very nutritious, but health experts warn us: some eggs should not be eaten. So, what kind of eggs should not be eaten?
1. Dead-in-shell eggs:
Eggs that cease to develop during incubation due to contamination by bacteria or parasites, combined with poor temperature and humidity conditions, are called dead-in-shell eggs. The nutritional content of this type of egg has changed. If the death occurred a long time ago, the proteins will decompose and produce various toxic substances, so it should not be eaten.
2. Rotten eggs:
Due to bacterial invasion and massive reproduction inside the egg, it becomes spoiled. The eggshell turns a dark grayish color, and the internal gas (hydrogen sulfide) may even cause the shell to expand and rupture. The egg's contents will appear grayish-green or dark yellow and have a foul odor. Such eggs must not be eaten, as they can cause bacterial food poisoning.
3. Cracked eggs:
During transportation, storage, and packaging, eggs can develop cracks or fractures due to vibration and squeezing. This makes it very easy for bacteria to invade. If they have been stored for a long time, they should not be eaten.
4. Loose-yolk eggs:
This can be caused by the yolk membrane rupturing due to violent shaking during transport, leading to mechanical separation. Alternatively, if stored for too long, bacteria or molds can enter the egg through the shell's pores,破坏蛋白质结构造成散黄，蛋液稀薄混浊。若散黄不严重，无异味，经煎煮等高温处理后仍可食用，但如细菌在蛋体内繁殖，蛋白质已变性，有臭味就不能吃了。破坏ing the protein structure and causing the yolk to separate. The egg white will be thin and cloudy. If the separation is not severe and there is no strange odor, it can still be eaten after being cooked at high temperatures, such as frying or boiling. However, if bacteria have multiplied inside the egg, the proteins have denatured, and it has a foul odor, it should not be eaten.