Onions long mold can not be eaten. Appearance of mold spots on the onion has deteriorated, other places without mold spots may also have appeared in the mold infection situation, after consumption is easy to abdominal pain, diarrhea and even food poisoning may occur, it is recommended that the moldy onions have been thrown away. After the surface of the onion mold can be seen on the surface of the moldy mycelium, this part contains a large number of mycotoxins, if consumed inadvertently may cause food poisoning. Even if you cut off the part of the surface with black mycelium, but this does not mean that there is no mycelium inside the part does not contain mycotoxins, coupled with the proliferation of mold can not be seen by the naked eye, so for the sake of human safety, remove the moldy part of the onion can not be consumed again. Water rinse off the surface of the mold seems to have no effect, in fact, the mold still exists, in addition to water washing after using high-temperature cooking and frying and other methods can not remove all the mold, so the onion mold can not be eaten again.