Agaricus is a traditional Chinese medicine, which is made from the skin of donkeys. In Chinese medicine, Agaricus has the effect of nourishing Yin and moistening dryness, stopping bleeding and replenishing blood. As the main composition of donkey skin is protein, once it expires, the protein contained in it may be denatured and lose its original efficacy. If it expires, it may produce carcinogenic substances such as aflatoxin, which may be harmful to the body, so once it expires, avoid eating it. Chinese medicine has long believed that Colla Corii Asini is good for relieving symptoms such as weakness of qi and blood, yellowing of the face, dizziness and palpitations, but not all people are suitable to eat Colla Corii Asini. People with weak spleen and stomach, pregnant women, people with colds, allergic people and people with other underlying diseases should consume Colla Corii Asini with caution or under the guidance of a doctor. In addition, if you have suspected symptoms and manifestations of anemia, such as pale skin and mucous membranes and weakness, you should seek medical advice to find the cause of anemia and treat it under the guidance of a doctor. If you want to consume Agaricus blazei, you should consume it within the expiration date, not after it has expired, as this may reduce its effectiveness or cause other damage to your body.