Modern scientific analysis shows that shiitake mushrooms are not only delicious, but also high in protein and low in fat. Each hundred grams of dried shiitake mushrooms contains 13 grams of protein (close to the content of meat and eggs), 1.8 grams of fat, 54 grams of carbohydrates, 124 mg of calcium, 415 mg of phosphorus, 25 mg of iron; vitamins B1, B2, and C The content is higher than that of vegetables such as carrots, tomatoes, and spinach. Another characteristic of shiitake mushrooms is that the vitamin B and other nutrients contained in other foods cooked with them will not be destroyed by heat. Shiitake mushroom protein contains 18 kinds of amino acids. Shiitake mushrooms account for 7 of the 8 kinds of amino acids necessary for the human body. Most of them are type 1 amino acids, which are highly active and easily absorbed by the human body. The digestibility is as high as 80%. Because shiitake mushrooms are rich in glutamic acid and agaricosanine, oriotriamine and anserine, which are rare in general foods, they have a particularly delicious flavor.