
When buying eggs, we often have doubts about their freshness. In order to understand whether a fresh product or in a store they simply interrupted the date, one should learn to determine its condition, especially since this is not so difficult to do, or rather, quite simple.
Briefly about the structure and composition of eggs

An egg has two components: the yolk, which weighs about 1/3 of the mass of the egg, and the white, which has 2/3 of the mass. The latter contains proteins and water, and the former contains a small amount of proteins, vitamins, fats, macro- and microelements, and water. In addition, there is a chalaza. These are threads of a murky color in the squirrel. Many believe that this is a fetus, but this opinion is erroneous. The threads are intended for fixation in the yolk protein.

Others argue that chalaza should be removed as it is harmful and interferes with the whipping process. But this is also not true. Not only does it contain nothing harmful and does not affect the whipping process, you also cannot find it in an egg when cooking, even if boiled or fried. During storage, the structure of the chalase changes. If the egg is fresh, then the chalaza is clearly visible, it is tough and thick. When the egg is old, the chalaza becomes almost invisible. The egg also has an air pocket located near the blunt end of the egg.
Freshness of eggs

Fresh eggs are also called dietary ones. This category includes products whose shelf life does not exceed seven days. Eggs, which have a slightly longer shelf life, are considered by some to be worse than dietary ones. In fact, this does not affect their nutritional value in any way. During storage, two main changes occur in the egg:
- it changes shape, acquires a more liquid consistency and you will have to tinker with it to beat it, and it will be more problematic to boil a poached egg;
For cooking, it is better to take an already lying product, and not completely fresh. On these grounds, they check how fresh chicken eggs are.
1. Testing method based on consistency

The shape of a fresh egg is oval, and the round yolk is located strictly in the middle. If the egg has been lying for some time, the protein begins to spread, the egg takes on a different shape, irregular. The yolk is closer to the edge and becomes slightly flattened. This is due to the fact that the chalaza is weakening.
2. The method based on the size of the air pocket

To check the freshness of the product, you need to place the egg in water:
- up to 1 week - lies on its side, exactly;

In the case when the egg does not submerge in water, but floats, it should be discarded. It has already disappeared and this product cannot be used for food.
Continuing the topic read, "Grandma's Way", how to quickly peel a boiled egg.