Subject to availability. If there is a thin layer of white fluff on the shell and there are no white spots when peeled off, it is a normal phenomenon. If there is a layer of white frost accompanied by a peculiar smell, it is moldy. Moldy chestnuts are not edible. Moldy chestnut shells indicate that the chestnuts have bred many bacteria. Although the pulp is not moldy due to the protection of the shell, it is also contaminated by mold.

Subject to availability. If there is a thin layer of white fluff on the shell and there are no white spots when peeled off, it is normal. If there is a layer of hoarfrost with a peculiar smell, it is moldy. Moldy chestnuts are not edible. Moldy chestnut shells indicate that the chestnuts have bred many bacteria. Although the pulp is not moldy due to the protection of the shell, it is also contaminated by mold.