What is the cause of black inside eggs, is it normal to have black things inside eggs?

Causes of blackening inside eggs:

1. Mold. Bacteria invade the eggs, causing them to become moldy, spoiled, and appear black spots. At this time, the composition of the eggs has changed, and it is not recommended to eat them.

2. Dead peptide eggs.

Dead peptide eggs are chick embryos that have stopped developing after being infected by bacteria or parasites during incubation, and have black spots on the inside. The nutritional composition of stillborn eggs has been altered and invaded by bacteria, so it is not recommended to consume them.

3. Overcooking.

During the cooking process, the cooking time is too long, resulting in ferrous ions in the egg yolk.

with sulfide in egg whites.

Ions combine to form ferrous sulfide.

Thus discoloring the eggs. Ferrous sulfide is difficult for the body to absorb and causes indigestion.

Here's a look at how to choose fresh eggs:

How to choose fresh eggs:

1.Touching eggs is very important, and it is also an important skill for us to distinguish fresh eggs from old eggs. If it feels very rough to the touch and has a strong texture, it is a fresh egg, because the smoothness of the aged egg is very bad, and there will be no texture like a fresh egg.

2.Looking at the appearance, the old eggs appear relatively bright, and there are almost no pores, which is because the time has been placed for too long, and the pores have been blocked by dust, so this situation occurs. The fresh eggs are very bright, and even some subtle pores on them can be seen very well.

3.Smell the smell, the eggs are fresh and there will be a stream of quicklime.

In addition, if you take a breath on the egg, there is the fishy smell of the egg, it is fresh, if there is none, it is an unfresh egg.

If the egg is stored for too long, the resistance of the film on the eggshell will decrease, and the bacteria will enter the egg, resulting in the deterioration of the egg, sticky shell and yellowing, at this time, not only the pathogenic bacteria will multiply, but the protein will deteriorate and rot.

Black spots in eggs may be caused by mold or inflammation of the fallopian tubes of raw eggs, and it is best not to eat them when this happens, so as not to have some unhealthy effects on the body. Eggs, also known as chicken eggs and chickens, are eggs laid by hens. It has a hard shell on the outside and an air cell, egg white and yolk on the inside.

Rich in cholesterol and rich in nutrients. An egg weighs about 50 grams and contains 7-8 grams of protein and 5-6 grams of fat.

Abnormal.

There are several types of black spots in eggs:

1. The black dot is a blood clot in the egg.

2. Bacteria invade the egg and become moldy and deteriorate, resulting in black spots on the eggshell and mold, that is to say, the black spots are microorganisms.

3. During the incubation process, the eggs are contaminated by bacteria or parasites, coupled with poor temperature and humidity conditions, resulting in the embryo stopping development and the black spots formed by the stillbirth.

Some chickens are going to have this when they lay eggs for the first time, and it's the placenta that has blood in it, a placenta with blood in it.

That's because the eggs are spoiled, and the spots caused by mildew are created by the broken part of the eggshell, not from the egg white. In addition, if the eggs are stored for too long, the broken eggshell will also produce black spots, which means that the eggs have gone bad.

Eating spoiled eggs can cause poisoning, diarrhea, abdominal pain, nausea and other symptoms, and in severe cases, death. Eggs must be kept in the refrigerator; When buying eggs, make sure the eggs are fresh; When cooking, first crack the eggs in an empty bowl to check whether the eggs are fresh, if the yolk has been scattered, and it still emits a peculiar smell, it must not be eaten.

The egg white blackening after boiling may produce parasites inside the egg, and it will deteriorate, and it can no longer be eaten at this time, or it may be because the egg has local clotting inside during fertilization, or the hen eats black food that is not conducive to digestion during the growth process, and then lays eggs, in both cases, the egg white will also be black after cooking.

Causes of egg whites blackening after boiling

1. Parasites

nbsp;The blackening of the egg white after cooking may be because the egg has been left for too long, and parasites are produced inside, and the parasites undergo biochemical processes to produce toxins, which makes the eggs deteriorate, so that the boiled egg whites will appear black, and eating them will damage human health.

2. Local coagulation

nbsp;One of the reasons why eggs turn black after boiling is that when the eggs are fertilized, there is clotting inside. This is usually normal in the early stage of egg fertilization, and if the egg is in this case, it can be continued to be eaten.

3. Black food

The egg white blackening after cooking may be because the hen eats black food that is not conducive to digestion when she grows up, in addition to eating feeding feed, so that melanin will remain in the hen's body, and the eggs laid afterwards will also contain some melanin, so the egg whites will be black after cooking.

The boiled eggs are blackened, indicating that the eggs are fresh and show signs of spoilage. As for the cause of egg white discoloration, if the egg shell cracks or cracks after the egg is produced, spoilage bacteria will infiltrate, and the egg white and yolk may become infected and discolored. Different bacterial infections are different in color, some are black and some are gray.

To identify whether the eggs are fresh or not, put the eggs under the light, if the color is not dark, they are fresh. At the same time, pick up the egg and shake it, if you feel the egg rattle, it means that the egg is not good.

When buying loose eggs, you should pick the surface that is rougher. The shell of such an egg is bright in color, the pores are obvious, and the surface is covered with a layer of natural antibacterial substances, which is relatively fresh. If the surface of an untreated egg is smooth, it means that it has been left out for a while and its freshness has decreased.

However, the boxed eggs have been treated and the surface is smooth, which does not mean that the eggs are not fresh. When buying boxed eggs, you should choose one with a relatively recent production date.

In addition, eggs of the same size, fresh ones tend to be heavier, and those that have been stored for a long time will be lighter, because the shell of the eggs will carry out breathing activities, and the air chambers of fresh eggs are relatively small, and with the extension of egg storage time, the air chambers will enter more and more air, and the air chambers will become larger, the weight of the eggs will become lighter, and the freshness will decrease.

If it is black, it is best not to eat it.