1. Do not drink Pangcha sea tea after it has expired, and its efficacy will be reduced: the shelf life of the stems, leaves, flowers, roots, etc. of general herbal medicines does not exceed 2 years, and the general shelf life of woody medicines can be as long as 4 years. If Pangdahai is stored for a long time, although there is no deterioration in appearance, the efficacy will be significantly reduced;

2. Easy to be eaten by insects: Pangdahai is rich in nutrients such as polysaccharides and amino acids, which is suitable for The moths grow and multiply, and are brittle and fragile in texture. They are easily eaten by moths after expiration. If they are not cleaned thoroughly, the feces and corpses of the moths may remain. Taking them may cause adverse reactions in the body, such as abdominal pain, diarrhea and other symptoms. ;

3. Easy to mildew: There are many wrinkles on the surface of Pangdahai. If Pangdahai expires or is improperly stored, mold spores and other microorganisms are easy to attach to it and are difficult to clean, which may lead to mildew and harmful effects to the human body. substance. After consumption, it can easily cause abdominal pain, nausea, vomiting, and even poisoning symptoms in patients.