How to choose fresh eggs?

First, look at the appearance: it is best not to buy eggs with sand spots on the eggshell, because its eggshell is thin and bacteria can easily enter the egg.

Second, listen to the sound: pick up the egg and shake it in your ear. If there is no sound, it is a relatively fresh egg; The sound of water shaking is old eggs.

Third, smell the eggs: fresh eggs will have a slight smell of quicklime, and old eggs will not.

Fourth, use up the eggs: observe the eggs in the light, and the good eggs are brightly colored.

The complete eggshell is oval, with one end big and one end small, accounting for about11%~1.5% of the whole egg volume. Eggshell can be divided into upper shell membrane, lower shell skin and air chamber. There are many ways to eat eggs, such as boiling, steaming, frying and frying.

Eggs are one of the best sources of nutrition for human beings. Eggs contain protein and eight essential amino acids. Fat contains a lot of lecithin, triglycerides, cholesterol and egg yolk; Minerals include iron, phosphorus and calcium. Vitamins a, B2. B6.D, e and nicotinic acid, etc.