Any tips for boiling eggs? Five taboos about eating eggs

Any tips for boiling eggs? Five taboos about eating eggs

Do you think boiling eggs is very easy? Boiling the water eggs for a while will be OK. is it really like this? In fact, there are some tips for boiling eggs.

1. Soak in water.

Before boiling eggs, it is best to soak them in cold water for a while, then put them in a cold water pot and boil them, so that the eggshells are less likely to break. Of course, this is just one way to keep the egg's shape intact.

2. Firepower.

If you use high heat when boiling eggs, it will easily cause the air in the eggshell to expand rapidly and cause the eggshell to burst; if you use low heat, it will prolong the time of boiling the eggs, and it will not be easy to control the tenderness of the eggs. Practice has proven that medium heat is the most suitable for boiling eggs.

3. Time.

After determining the amount of firepower, as long as you accurately grasp the egg boiling time, you can control the tenderness of the eggs as you like. For example, to boil soft eggs, boil them for 3 minutes after the water boils. At this time, the egg white is solidified and the egg yolk is still fluid; boil the soft-boiled eggs for 5 minutes after the water boils. At this time, the egg white is solidified and the egg yolk is thick liquid, soft, tender and smooth; boil hard eggs and boil the water for 7 minutes. At this point the egg white is solidified and the yolk is dry. It should be noted that when boiling hard eggs, the time must not be extended at will. Because when eggs are cooked in boiling water for too long, more than 10 minutes, a series of chemical changes will occur inside the eggs, thereby reducing the nutritional value of the eggs.

4. Stir.

In order to make the egg yolk solidify in the middle of the egg white, after the eggs are placed in the pot, stir them continuously in one direction with a spoon to make the water in the pot rotate in a whirlpool until they are cooked. As for the principle behind this, it must be related to the centrifugal force and centripetal force in physics.

Taboos about eating eggs:

1. Avoid eating undercooked eggs

Egg protein contains avidin, which will affect the absorption of biotin in food, causing symptoms such as loss of appetite, general weakness, muscle pain, skin inflammation, and eyebrow loss. Eggs contain antitrypsin, which affects the body's digestion and absorption of egg protein. These two substances in undercooked eggs have not been broken down, thus affecting the digestion and absorption of protein. Eggs will carry bacteria during the formation process. Uncooked eggs cannot kill bacteria and can easily cause diarrhea. Therefore, eggs should be eaten after they have been heated to high temperatures. Do not eat undercooked eggs!

The protein structure of raw eggs is dense, and a large part of it cannot be absorbed by the human body. Only when the protein is cooked does it become soft and can be digested and absorbed by the human gastrointestinal tract. Raw eggs have a special fishy smell, which can cause central nervous system depression and reduce the secretion of digestive juices such as saliva, gastric juice, and intestinal juice, leading to loss of appetite and indigestion.

2. Avoid eating hard-boiled eggs

If eggs are cooked for too long, a gray-green ferrous sulfide layer will form on the surface of the yolk, which is difficult to be absorbed by the body. Aged protein will become hard and tough, affecting appetite and making it difficult to absorb.

3. Eggs should not be boiled with sugar

Boiling eggs with sugar will produce a substance called glycosyl lysine due to the high temperature, which destroys the amino acid components in eggs that are beneficial to the human body. Moreover, this substance has a blood coagulation effect and will cause harm after entering the human body. If you need to add sugar to boiled eggs, you should wait for them to cool slightly before adding them and stir them in so that the flavor is not reduced.

4. No need to add MSG to scrambled eggs

Eggs contain sodium chloride and a large amount of glutamic acid. When these two ingredients are heated, they form sodium glutamate, which has a pure umami taste. The main component of MSG is also monosodium glutamate. If MSG is added to scrambled eggs, it will affect the synthesis of monosodium glutamate in the eggs themselves and destroy the delicious flavor of the eggs.

5. Do not store hard-boiled eggs after soaking them in cold water

Some people often immerse hard-boiled eggs in cold water to take advantage of the different thermal expansion coefficients of eggshells and egg whites to make the eggshells peel off easily, but this practice is unhygienic. Because there is a protective film on the surface of fresh eggs, the water in the eggs is not easy to evaporate and prevents microorganisms from invading. After the eggs are cooked, the membrane on the shell is destroyed, and some gas in the air cavity of the eggs escapes. At this time, the eggs will be placed in cold water. The temperature in the air cavity drops sharply and the pressure becomes negative. Cold water and microorganisms can enter the egg through the pores on the eggshell and the double-layer membrane inside the shell, making it prone to spoilage during storage.