Bird's nest is a kind of food with high carbohydrate and high protein. Bird's nest contains a lot of mucin, glycoprotein, calcium and phosphorus, which can enhance the body's resistance to diseases, but it does not contain fat, so it will not get fat. Extended information

Bird's nest, also known as Swallow, Swallow Root and Swallow Vegetable, refers to the nest made by saliva secreted by some Swifts of Swift Family of Swift Order and several Jin Siyan species of Swiftlet, and then mixed with other substances.

Bird's nest can be divided into "house swallow" and "cave swallow" according to the nesting place. The color of cave swallow is different due to the influence of minerals, including Bai Yan, Huangyan and Hongyan. The so-called "blood swallow" in the market is made by artificially cultured house swallow through "bird droppings fumigation". Bird's Nest is one of the traditional precious foods that have been eaten in China since the Ming Dynasty.

Reference: Baidu Encyclopedia-Bird's Nest