Can shiitake mushrooms be eaten after being stored for 20 days?

Nov 10, 2025 Source: Cainiu Health

Dr. Yu Yongchao

Introduction

In general, whether shiitake mushrooms can still be eaten after being stored for 20 days depends on their specific storage conditions and whether they have spoiled. If in doubt, it is recommended not to consume them. Fresh shiitake mushrooms should be promptly sealed and refrigerated after purchase and consumed within one week; dried shiitake mushrooms should be kept sealed and protected from moisture, stored in a cool place. Always check the appearance, smell, and texture carefully before consumption.

Generally, whether mushrooms can still be eaten after being stored for 20 days depends on the specific storage conditions and whether they have spoiled. If in doubt, it is recommended not to consume them. The detailed analysis is as follows:

If the mushrooms were well sealed during storage, kept under stable refrigeration without repeated thawing, or if they are dried mushrooms stored in a sealed container in a cool, dry place, and after 20 days show no signs of mold or darkening, have no sour or rotten odor, and maintain a firm texture (or remain dry and non-sticky), then they are likely unspoiled and safe to eat. Fresh mushrooms should be thoroughly washed, and dried mushrooms must be fully rehydrated before cooking to ensure food safety.

If the mushrooms were not sealed during storage, fresh mushrooms were left at room temperature for extended periods or repeatedly thawed and frozen, and after 20 days exhibit a slimy surface, mold spots, unpleasant odors, soft or mushy texture, or clumping due to moisture absorption, they have spoiled and should not be consumed. Spoiled mushrooms harbor large amounts of microorganisms, and eating them may irritate the gastrointestinal tract, causing discomfort such as abdominal pain and diarrhea, potentially harming health.

It is recommended to promptly seal and refrigerate fresh mushrooms after purchase and consume within one week; dried mushrooms should be stored in sealed, moisture-proof containers in a cool place. Always inspect appearance, smell, and texture before consumption. When in doubt, do not eat them—prioritize food safety.

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Can squid and shiitake mushrooms be eaten together?

In general, squid and shiitake mushrooms can be eaten together, as long as consumption is moderate. Before eating, the squid should be thoroughly cleaned to remove internal organs and surface mucus, while the shiitake mushrooms should be soaked and rinsed to eliminate dirt and sand. Both ingredients must be fully cooked to ensure they are completely heated through, to avoid bacterial infection or gastrointestinal discomfort caused by undercooking. Individuals with weak digestion should limit their intake to prevent excessive consumption, which may increase digestive burden.

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Can peanuts and shiitake mushrooms be eaten together?

In general, peanuts and shiitake mushrooms can be eaten together, as long as consumed in moderation. It should be noted that peanuts are high in calories and should not be eaten excessively, especially by individuals with weak digestive function, to avoid bloating. Shiitake mushrooms should be fully soaked and thoroughly washed before consumption to remove any possible impurities or harmful substances. Spoiled peanuts or shiitake mushrooms must not be eaten.

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Can fresh shiitake mushrooms be eaten after a few days of purchase?

Fresh shiitake mushrooms, if stored under low-temperature refrigeration, sealed and protected from moisture, and show no signs of spoilage such as rotting, mold, or unpleasant odor, are generally still safe to eat after several days. However, if improperly stored or showing any signs of spoilage, they should not be consumed. If symptoms such as vomiting or diarrhea occur after consuming mushrooms suspected of being spoiled, prompt medical attention is recommended. At room temperature, shiitake mushrooms are prone to bacterial and mold growth, which can lead to spoilage.

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Can soaked shiitake mushrooms be kept until the next day?

In general, whether soaked shiitake mushrooms can be kept until the next day depends on the storage method. If stored sealed in the refrigerator and show no signs of spoilage, they can be kept for the next day; however, if left at room temperature or already spoiled, they should not be kept. It is recommended to soak and consume shiitake mushrooms immediately during daily preparation, avoiding prolonged storage. If leftovers must be saved, ensure they are tightly sealed and refrigerated, and do not store for more than 24 hours.