Auricularia auricula is not only delicious, but also rich in nutrients, especially elements such as calcium and iron. However, black fungus is cold, and people with spleen and stomach deficiency and cold should eat carefully. Features and efficacy: the content of nutrients is extremely rich, especially calcium, iron and other elements. Except protein, other events are inferior to amaranth. It has the effects of clearing away heat and toxic materials, moistening intestines and cooling blood, and can be used for treating constipation, dysentery, furuncle and dermatitis. Rich in carotene, vitamin B, vitamin C and protein, and low in calories and fat, it has the effects of lowering blood pressure, benefiting liver, clearing heat and cooling blood, diuresis and preventing constipation, and is very suitable for the elderly.