It is generally edible. The black circle inside is because the mushroom has become old and the spores have been released, which does not affect consumption. But if it is obviously rotten, moldy, or moldy, you must not eat it.

Mushrooms are edible fungi grown indoors. It gradually grows from mycelium to fruiting bodies and finally becomes edible fungi. In the right environment, it can grow faster and better. Mushrooms are saprophytic fungi. They have no chlorophyll in their bodies, so they cannot photosynthesize directly in the presence of light. During the growth of mushrooms, various nutrients in the culture material are mainly used as a source of nutrients to achieve growth and development. Breeding feed usually consists of pig manure, cow manure, phosphate fertilizer and other materials.

Why are mushrooms black inside?

Mushrooms turn black because they are rich in polyphenolic compounds and polyphenol oxidase. Polyphenol compounds are easily oxidized under the catalysis of enzymes, producing many brown and black substances. Blackening will only affect the visual effect, but will not affect the safety of eating.

In addition, the inside of spoiled mushrooms will turn black and have a foul smell. This kind of mushroom is poisonous. If eaten, mild poisoning such as nausea, vomiting, and dizziness may occur.