Why is the inside of raw eggs black?

The black spots in the eggs are because the eggs are not fresh anymore. Raw egg yolks.

There is a thin white band on each side, which is called the yolk frenulum, which is the natural structure that holds the yolk, the fresher the egg, the more obvious this frenulum is; On the other hand, the frenulum of stale eggs will gradually blur or even be invisible and free in the egg white. When the eggs are heated, the cysteine in the egg protein is made.

Partially decomposed, hydrogen sulfide is produced.

It is then combined with the iron in the egg yolk to form black iron sulfide, but because of its low content, it has no toxic effect on the human body. In addition to the long heating time, it is also easy to appear because the eggs are placed for a long time and the freshness is reduced, which makes the egg protein partially decomposed.

The inside of the egg is black and cannot be eaten, so it is recommended to throw it away immediately. The blackening of the eggs can be caused by bacteria or stillborn eggs. Stillborn eggs are eggs that stop developing due to contamination by bacteria and parasites during incubation, as well as poor temperature and humidity conditions.

The nutrients contained in this kind of egg have changed, such as the long time of death, the protein will be broken down to produce a variety of toxic substances, so it is not suitable for consumption, so as not to harm the body.

Ask with your nose, if there is a smell of rotten eggs, it means that the eggs are bad, and it has been for a while, don't try it.

If the raw egg is beaten and blackened, it generally means that the egg has spoiled and cannot be eaten.

It's broken!! Don't eat it! Throw it away! It's spoiled.

Nose, if rotten eggs smell, clear eggs are bad, it's been a while, don't try it.

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.

When steaming eggs, the color changes too much, and some of them are black. This condition is edible, but the eggs are steamed and old, and the steam in the top layer slightly oxidizes the surface of the egg, so the color does not change much, because the egg contains iron ions. Nutritional effects of steamed eggs:

Brain tonic, intellectual, liver protection, arteriosclerosis prevention, cancer prevention, anti-aging. At the same time, it can also beautify skin care, enhance human immunity, dredge milk, relieve neurasthenia, help recovery after illness, and prevent arteriosclerosis. Steamed eggs are not recommended for patients with kidney disease, hypercholesterolemia, and atopic dermatitis.

The following three types of eggs should not be eaten:

1.Cracked eggs: During transportation, storage, and packaging, some eggs will develop cracks and cracks due to vibration, extrusion, etc., which are easy to be invaded by bacteria.

2.Sticky shell eggs: Due to the long storage time, the yolk membrane weakens, and the yolk is close to the eggshell. If the egg membrane is partially red, it can still be eaten.

3.Rotten eggs: As bacteria invade the eggs and multiply in large numbers, the eggs spoil, and the eggshells are black, gray, or even burst due to the expansion of the hydrogen sulfide gas inside.

Eggs cannot be eaten after they have turned black. Eggs turn black due to spoilage and germ growth to avoid gastrointestinal upset. How to store eggs in summer Do not wash them before bulk storage, because there are not only holes in the eggshell, but also a film that will be destroyed during the cleaning process.

On the contrary, bacteria can easily enter the egg through the pores, accelerating the spoilage of the egg. If you buy a whole box of eggs, it is best to keep them in the refrigerator with the box to ensure the freshness of the eggs to the greatest extent. When placing loose eggs in the refrigerator, it is best to rinse off the sharp points of the eggs, because the air chamber of the eggs is located at the round end of the egg, and the round end is facing up, which can avoid yellowing and prolong the storage time.

Eggs stored in the refrigerator are not easily moved repeatedly. Especially when the weather is hot, the eggs taken out of the refrigerator should be eaten as soon as possible and do not put them back in the refrigerator, because when the eggs are hot and cold, small water droplets will be produced on the surface, and bacteria will attach to the surface of the eggshell.

If the eggs turn black, what we are telling you here is that it is best not to eat them again, blackened eggs mean that the inside of the eggs should be spoiled, then it will definitely be harmful to the body after everyone eats them, so it is best for everyone to eat fresh eggs.

No. Because when the egg is black, it is already bad, and eating it will cause diarrhea, so it should not be eaten.

If the egg is black, it is not edible, the normal egg white should be transparent, the color of the egg yolk is yellow or orange, and there is no yellowing, if it becomes other colors, it is recommended not to use it, so as not to get food poisoning.

You can't eat it. Raw eggs have black spots in them Cause:

1. Eggs with black spots may be moldy eggs, that is to say, black spots are microorganisms produced by mold, and it is best not to eat them.

2. It may be that the oviduct of the egg-laying chicken has black spots caused by inflammation, and it is best not to eat it.

3. It is best not to eat eggs with black spots caused by feed problems.