If you are used to prepare boiled eggs, you may have noticed a kind of green ring around the yolk. What is the cause for this phenomenon? Is it safe to eat eggs that contain this green ring? Find the answers in this article.
Having boiled eggs is always handy when you are hungry and avoid turning to less healthy options. In a salad, sandwich or eaten as is, the eggs are delicious and can enhance any dish, both in taste and nutrition!
Indeed, the eggs are a concentrate in nutrients, vitamins and minerals. They are excellent sources of complete proteins because they contain all the amino acids our bodies needs, but also fatty acids necessary for proper operation. Eggs also contain lutein, a carotenoid that protects the vision and prevent AMD (Age-related Macular Degeneration). This component is also found in green vegetables, but the content in the eggs is better absorbed by the body and therefore more beneficial!
Furthermore, eggs, or egg yolks in particular, are foods rich in choline, an essential nutrient that helps to preserve brain function thus prevent stroke. This observation is one of the conclusions of a scientific study published in the British Medical Journal and conducted on over 4 million people. According to this study, egg consumption in sufficient quantity can actually reduce the risk of stroke by 25%.
Eggs are excellent foods for the health. Boiled eggs are a good option because they are convenient and easy to prepare, but it is still necessary to know how to cook them properly!
Indeed, to prepare boiled eggs can be a bit confusing: you never know how long it takes to cook them! If they are undercooked, they are very flowing, and if they are overcooked, a green ring may appear on the egg yolk!
What is this green ring on the egg yolks?
A green ring around the egg yolk is a proof that the eggs were overcooked. You just left them a bit longer on the fire than you should.
The scientific explanation for this phenomenon is quite simple; it is the result of a chemical reaction between the hydrogen sulfide and the iron in the egg. In fact, following the effect of heat, the hydrogen sulphide present in the egg white will react with the iron in the egg yolk, which causes the formation of iron sulfide. It is iron sulfide that surrounds the egg yolk when it is overcooked.
However, the presence of this green ring does not mean that the eggs are not good for consumption or that present a health hazard. They are still healthy and keep their entire nutritional elements.
How to avoid the green ring on the eggs?
From a purely aesthetic point of view, to avoid the appearance of this green ring, you just simply need to cook them properly. Here, the cooking time is the key; you do not need to cook your eggs for too long. Here is a simple way to cook your eggs properly.
Place the eggs in a saucepan and cover them with cold water. The pan should be large enough to hold the eggs in a single layer. Bring the eggs to a boil and once it boils, remove from heat and put a lid on the pan.
Let the eggs rest for 15 minutes, then rinse with cold water to stop the cooking process. And now, your boiled eggs are ready, and without a green ring!
If you prefer poached eggs, just reduce the resting time.
Other tips to prepare the eggs
- Eggs should not be cooked more than 12 minutes.
- It is best to put the eggs in cold water and then bring to a boil, instead of placing them in boiling water.
- Use the least fresh eggs in the refrigerator, because they will peel more easily.
- Put the unpeeled eggs in an airtight container and place them in the refrigerator. They can be stored up to a week.