Immersing boiled eggs in cold water can really make the eggs cool down quickly. Because the inner eggshell membrane and egg white membrane contract differently in cold, it is easy to form a certain gap, which makes the eggshell easier to be peeled off.

But this ignores the fact that there are a lot of bacteria in cold water. After the egg is heated, the eggshell membrane that can prevent bacteria from passing through has been destroyed, so that the eggshell vent hole can no longer block bacteria, so bacteria can easily take the opportunity to invade the egg, which can be said to be free to come and go.

The correct way is to add a small amount of salt in the process of cooking eggs. Salt can not only sterilize and detoxify, but also make eggshell membranes and eggs.

Extended data

Skills of boiling eggs

The best state of boiled eggs is that the egg white has solidified, while the yolk has just solidified, and the texture is soft and tender, and the color is golden. Egg white and yolk solidified, indicating that the central temperature can reach about 70℃ at this time, salmonella has been killed and anti-nutritional substances can be removed; The egg yolk has just solidified slightly, which means that the cooking time will not be too long, and the oxidation degree of nutrients is relatively low at this time.

The following is a timetable for boiling eggs, for your reference:

1, boil for two minutes. At this time, the yolk is orange-red, which is a little sticky and immature at first;

2, boiling for four minutes, the yolk is bright yellow and soft, the center is still not semi-solid, just cooked;

3, boiling for five minutes, the yolk is still not bright yellow, the center is congealed and medium-cooked;

4. Boil for six minutes, the center of the yolk solidifies, and the periphery has begun to dry and fully cooked;

5. After boiling for more than seven minutes, the yolk becomes hard and the edge becomes gray, and the longer it takes, the more obvious it becomes.

People's Daily Online-Boiled eggs are unhealthy when cooled in cold water. Don't eat more than 3 egg yolks every week.

People's Network-Boiling eggs pays attention to the fact that if eggs are cooked for too long, good fat will "go bad"