Eggs are foods that we often eat in our daily lives. They are rich in high-quality protein and other nutrients. Many people like to eat boiled eggs, but after the eggs are cooked, when the shell is peeled, many people may If you find that there are small black spots on it, you will worry that such eggs will not be broken and you cannot eat them. Why are there black spots on the eggs after they are cooked? Can such an egg be eaten? Let's take a look together below.
Why do small black spots appear on the eggs after they are cooked?
There are many nutrients in eggs. The yolk contains more protein, fat, minerals and some trace elements. These trace elements are the reason for the surface discoloration of eggs after they are cooked. There are a large amount of phosphorus, iron and other elements. It is the main factor that causes small black spots.
When boiling eggs, according to the heating principle, heat enters from the outside to the inside, so the first thing that changes is the egg white. As the temperature rises, the solubility of itself decreases, so the hydrogen sulfide contained in the egg white is reduced. Forced to enter the egg yolk; at the same time, the iron element in the egg yolk will also change during the heating process, and the reaction between the two will eventually show a blue-black thing. And the longer the egg is cooked, the darker the color may be.
This is a normal phenomenon. Generally, the black spots are not too big, only small, and it is not a toxin that everyone is worried about. It has no adverse effects on your health and can be eaten with confidence. However, if there are a lot of black spots and smell, it is best not to continue eating. Eggs like
are edible, but there are also eggs that are really not suitable for eating, such as sticky shell eggs. This kind of eggs has been stored for too long, and the yolk membrane has become weak. If it is found that the egg membrane is close to the eggshell , The skin is still dark black, it will smell peculiar, do not eat; there are loose yolk eggs, if it is caused by violent shaking during transportation, the loose yellow is not serious and there is no peculiar smell, it can be eaten after high temperature treatment , But if bacteria or mold invade the egg, the protein is already deformed, so it is best not to eat it.
Eating safe eggs is beneficial to health. It can replenish high-quality protein in a timely manner, and the utilization rate is higher than that of porridge and bread. There are special substances in egg yolk. For people who use eyes frequently, eating more appropriately will help protect eyes. ; Eating eggs can also enhance satiety and avoid excessive hunger. However, it should not be consumed in excess, just one a day.
With the continuous improvement of people's health awareness, many people choose to eat raw eggs, thinking that the body absorbs better nutrients, but raw eggs are easily contaminated. It is not recommended to eat raw eggs to prevent diarrhea and bloating. Wait for the adverse reaction, it is better to cook and eat. Boiling or steaming is a good way of cooking. It is also recommended that you eat less fried or fried eggs, not only the nutrition is easily destroyed, but the calories and fat are also relatively high.
To sum up, after the eggs are cooked, there are small black spots on them when they are peeled off. This is a normal phenomenon and will not cause harm to the body. You can eat them with confidence. However, the above types of eggs are best to be eaten with caution. The way to cook eggs, it is recommended that you try to cook as much as possible and not fry, which is more beneficial to your health.
