What is the green border around the egg yolk after boiling? Is eating harmful?

Surely boiled eggs are familiar dishes that you have eaten many times. But sometimes while boiling eggs, you see around its yolks a purple-green color, looking like eggs have been moldy, making you feel scared and don’t dare to eat them. So let’s find out what are the edges around egg yolks that you often see and are they harmful to health!

What is the green border around the egg after boiling?

When boiling eggs, you just put them in the water and then turn on the stove to wait for the eggs to cook. But sometimes when you peel it off, you find the egg yolk has a green color that looks like… spoiled. Many people believe that when eating such eggs, they will easily get food, stomachache.

But the truth is that the green around the yolk appears because you have boiled the egg for too long . Each dish takes a certain amount of time to prepare, and so do eggs. When cooking for too long, the nutritional composition of eggs will be changed, resulting in discoloration of the yolk .

Did you know that the egg yolk contains a lot of iron , while the white contains hydrogen sulfide . When heated at high temperature, these two substances react together to form iron sulfide, so the egg yolk turns blue-gray .

In general, the green part makes the egg not aesthetically pleasing, but the taste of the egg does not change and it is not harmful to health .

So, how long to boil eggs so that there are no edges around the yolk?

Usually, the time of boiling an egg will determine the maturity of the egg. However, according to the need to eat fully cooked eggs or peaches, you will have the right time to boil eggs. You can refer to the following egg boiling time:

>> All about how to boil eggs and how to watch a specific time for housewives

1 minute: This is when the white is thick but the yolk is still alive and flowing.

3 minutes: At this point, the white has gradually thickened but not yet firm, the yolk is still alive and liquid.

5 minutes: The white is fully cooked and the yolk is partially cooked, also known as the peach.

7 minutes: Hard white, red liquid is also 80% cooked and still has a little peach.

9 minutes: Eggs are fully cooked

Source: Journal of Public Health

Hopefully with the above information, you can be completely assured when you see the layer around the egg and know the time to boil the egg so that you can enjoy the boiled egg as you like!

See more:

>> How to boil eggs without water

>> Boiling mistakes you shouldn’t make

>> Peel a hundred eggs in a snap with this easy-to-peel egg boil

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