Generally speaking, there is no contraindication to eating mullein. It contains calcium, iron, vitamins and other nutrients that the human body needs, and can be eaten by the general population, but some people may not be suitable for long-term or large consumption of wood ear vegetable due to physical reasons. Wood fungus is rich in dietary fiber, so if people with poor digestive function consume wood fungus for a long time or in large quantities, it may increase the burden on the gastrointestinal tract, thus affecting digestive function and even causing digestive system diseases. In terms of traditional Chinese medicine, wood ear vegetable is cold, if consumed for a long time or in large quantities, it may aggravate the weakness of the body, cold into the body, thus appearing abdominal distension, diarrhea, abdominal pain, etc. Pregnant women consuming large quantities of wood ear vegetable may have the risk of miscarriage or premature birth. Before consuming mullein, you need to determine whether you belong to the above-mentioned group of people, and then process it cleanly before consuming it. If abnormalities occur after consumption, it is recommended to seek medical attention to avoid adverse effects.