Dried shiitake mushrooms are generally inedible after being stored for three years.

Dried shiitake mushrooms are usually made by drying fresh shiitake mushrooms, which can extend the storage time. The general shelf life is controlled at about 1 year. If it has been stored for about 3 years, the various nutrients contained in the food will be lost. At the same time, it may also cause a variety of bacteria to produce inside the mushrooms, causing the mushrooms to become moldy or deteriorate. After becoming moldy, they contain certain toxins. Therefore, dried mushrooms generally cannot be eaten after being left for 3 years.

Expired dried shiitake mushrooms are no longer fragrant and become moldy. Moldy dried mushrooms will become soft and develop amylase. Some of them have turned gray or have some black spots on them. These are no longer edible.

Precautions for storing dried shiitake mushrooms

1. Dry storage: shiitake mushrooms are a highly water-absorbent food material. If the moisture content of dried shiitake mushrooms is too high, it is easy to produce Oxidative deterioration, severe mildew will occur, so when storing dried mushrooms, it is best to add an appropriate amount of lime or dry charcoal to the storage container, which can have a good hygroscopic effect and prevent moisture.

2. Low-temperature storage: Dried mushrooms must be stored in a low-temperature and ventilated place. If conditions permit, the container in which the dried mushrooms are stored can be sealed and stored in the refrigerator.

3. Store in the dark: Shiitake mushrooms are a type of fungus, so they cannot receive light. If there is light, the temperature may rise, which will cause the dried mushrooms to deteriorate. Therefore, it is recommended to store them in dry conditions. Mushrooms should be stored away from light when stored. If stored under light, they should be packaged in light-proof bags.

Reference for the above content: Baidu Health-Can dried mushrooms be eaten after being stored for three years