Why does the egg turn black?

Many people like to eat preserved eggs in summer because they have a good effect of relieving heat. However, some people find that the color of the preserved eggs has changed when they eat them. Some have turned black, while others have turned yellow. This situation makes everyone very confused. They don’t know whether the preserved eggs have deteriorated. So why do the preserved eggs turn black?

First, why do eggs turn black? From the production process point of view, the difference between yellow-heart preserved eggs and black-heart preserved eggs lies in the content of edible pure alkali and externally applied lime. The content of the former is lower while the content of the latter is higher, so there are two results after the production; one with a yellow or red heart, and the other with a black heart (it may also become runny or hard due to time), but there is no problem with either of them and you can eat them with confidence. Warm reminder: When buying preserved eggs, buy lead-free preserved eggs, which will not affect your health.

Second, although preserved eggs themselves have certain nutritional value, they are not suitable for people to eat frequently. We know that preserved eggs have a certain cooling and heat-relieving effect, and what we usually eat is basically served cold with some seasoning. However, it is undeniable that if you eat preserved eggs for a long time, it will weaken the body's absorption of minerals, causing calcium, iron and zinc deficiency. In addition, pregnant women should eat less preserved eggs, because pregnant women should not eat too many foods containing lead. If they accidentally eat too much, it may cause the baby to be born with deformities. More serious consequences may lead to miscarriage, so be careful.

Why do preserved eggs turn black? You can find the answer after understanding the above content. Preserved eggs, also known as preserved eggs and changed eggs, are a traditional flavored egg product in my country. Preserved eggs are not only a delicious delicacy, but also have certain medicinal value. According to "Medical Collection", it can "relieve lung heat, sober up, remove large intestine fire, and treat diarrhea. It can disperse and astringe." It is often used to treat sore throat, pharyngeal therapy, hoarseness, and constipation.