Colla Corii As a kind of animal products that nourish blood and nourish yin, improper storage is easy to deteriorate and become moldy, and should be placed in a cool and dry place for airtight storage. Colla Corii Asini is a blood nourishing and yin nourishing traditional Chinese medicine made from donkey skin. It is suitable for people with blood deficiency, yellowish complexion (yellowish color without luster), dizziness, insomnia, and palpitations (rapid heartbeat, often accompanied by panic). Agaricus blazei should be used with caution for those with spleen deficiency and loose stools (thin, unformed feces). It should be stored in a cool and dry place in a closed container, or in a refrigerator if possible. As an animal product, Colla Corii Asini has a certain shelf life even if stored carefully. Normal Colla Corii Asini is glossy brown to dark brown and translucent. It has a slight odor and a slightly sweet taste. When found that the Colla Corii Asini is moldy and deteriorated, it should not be taken any more. Adverse reactions and contraindications of Colla Corii Asini are still unclear, and need to be reasonably applied under the guidance of a professional physician, and should not be used without authorization to avoid risks.