Auricularia auricula is rich in calcium, iron and other elements, and its oxalic acid content is very high. Low oxalic acid content will not affect the body's absorption of calcium, so Auricularia auricula is a good calcium supplement food, and it is also rich in vitamins, such as vitamin A, vitamin B, vitamin C and protein. Auricularia auricula is also a low-calorie and low-fat food. We eat this dish with good blood pressure lowering and diuretic effects, which is very suitable for people with liver problems and constipation, and is very suitable for the elderly to recuperate. Auricularia auricula is a cold food, which has the function of dredging menstruation and may cause abortion. For pregnant women, it is best not to eat cold food, so it is recommended that pregnant women eat less watercress.