The yolk of an egg is orange. The yolk is the yellow part inside the egg, opposite to protein. Most of the protein in eggs is concentrated in the egg white and egg membrane, and the rest of the nutrients are concentrated in the yolk. Egg yolk will solidify into a solid when heated. The main components of egg yolk are 17.5% protein, 32.5% fat, about 48% water, 2% minerals and multivitamins. It is very beneficial to people's growth.

How do you know if this egg is edible or not? It's bad.

1, look at the lights.

Good eggs and bad eggs are different under the light. A good egg is translucent and reddish to the light, and the outline of the yolk can be clearly seen.

Even if the poor egg is exposed to strong light, it is still opaque and looks black.

2. Shake and listen.

Shake the egg gently near your ear. Good eggs shake without sound, and bad eggs can hear the sound of water.

3. "Good eggs" are rough and "bad eggs" are smooth.

The shell of a good egg is bright in color and rough to the touch; The shell of a bad egg is black and smooth to the touch. Some bad eggs also have red or black mildew spots.

How to choose eggs:

1, touching eggs, this is very important, and it is also an important skill for us to distinguish fresh eggs from old eggs. If it feels rough and has a strong texture, it is a fresh egg, because the smoothness of the old egg is poor and the texture of the fresh egg will not appear.

2, look at the appearance, the old eggs look brighter and have almost no pores. This is because the pores have been blocked by dust for too long, so this will happen. Fresh eggs are so shiny that even the tiny pores on them can be seen clearly.

3, smell the taste, fresh eggs will have the taste of quicklime, if you breathe on the eggs, there is the smell of eggs, it is fresh. If not, it belongs to stale eggs.