Can you still eat dried yellowing velvet shiitake mushrooms?

Generally, yellowed dried velvet stem mushrooms (dry Lyophyllum decastes) are not recommended for consumption to avoid discomfort. The analysis is as follows:

Over time, pigments in dried velvet stem mushrooms may change, causing them to turn yellow. In such cases, although the nutritional value and texture of the mushrooms may decline somewhat, if the yellowing is accompanied by obvious signs of mold, fuzziness, unpleasant odor, or softening/rotting, this indicates microbial contamination and spoilage. At this point, harmful substances may have developed in the mushrooms, making them unsuitable for consumption. Eating spoiled mushrooms may lead to food poisoning, including symptoms such as diarrhea and vomiting. Once any of these signs of deterioration are detected, the mushrooms should be discarded immediately to prevent ingestion.

Prior to consumption, carefully examine the color, shape, and smell of the dried velvet stem mushrooms. High-quality specimens should be iron-gray in color with a slightly paler base and possess a rich, distinctive aroma. If the mushrooms appear yellowish, have an unusual odor, or show changes in shape, their edibility should be carefully assessed. To prevent spoilage, store dried velvet stem mushrooms in a dry, cool place, ensuring the packaging is well sealed. Avoid prolonged exposure to sunlight or humid environments.