Swallow ear, also known as black fungus, which can supplement carbohydrates, minerals and other proteins and other nutrients for the human body, but there is no special drug efficacy and effect. Fangxian as the country’s hometown of fungus, they produce black fungus color fresh, large, high quality, thick meat, and their black fungus “shape like flying swallows, the shape of the fly,” so won the “Yan ear” reputation. Black fungus is a kind of fungus family fungus genus of gelatinous fungi, also known as fungus, black cabbage, cloud ear, etc. 100 grams of fungus contains 25 calories, of which 6.75 grams of carbohydrates, 0.48 grams of protein, 0.04 grams of fat, 16 milligrams of calcium, 0.56 milligrams of iron. Black fungus, as a health food, is richest in lysine and leucine in protein. Bird’s ear cannot be used for prevention and treatment of diseases and should not be consumed by those who are allergic to it.