Can you still eat cold-mixed wood ear mushrooms the next day?

Generally, it is not recommended to consume cold-mixed wood ear fungus leftovers overnight. The detailed explanation is as follows:

During the preparation of cold dishes, operations are mostly conducted at room temperature without high-temperature cooking steps, making it easy for bacteria to contaminate the food. Even when refrigerated overnight, the low temperature can only inhibit bacterial growth, not completely eliminate it, allowing bacteria to slowly proliferate and produce harmful substances. Additionally, wood ear fungus itself contains high levels of moisture and nutrients. Long-term storage accelerates nutrient loss and may result in bacterial metabolism that deteriorates the taste, causes off-odors, and makes it more likely to irritate the gastrointestinal tract when consumed, leading to discomfort symptoms such as nausea, abdominal pain, and diarrhea.

When preparing cold-mixed wood ear fungus, one should prepare only the necessary amount and try to consume it all at once to avoid leftovers. If there are leftovers, they should be promptly stored in a clean, oil-free, sealed container, quickly refrigerated, and stored for no more than 8 hours. Before consuming leftovers, carefully check for signs of spoilage such as off-odors or sliminess. Even if the appearance seems normal, it is recommended to thoroughly heat the dish before eating to reduce safety risks. If any signs of spoilage are found, the food should be discarded immediately—do not risk consuming it.