Bird’s nest contains mainly amino acids, which are the constituents of protein. Nowadays, bird’s nest refers to the nest made by the saliva secreted by a type of swiftlet called the Rain Bird family, and then mixed with other substances such as feathers, among which the purity and nutritional value of the saliva protein of the swiftlet is the highest. By way of modern research, it is found that the main components of bird’s nest are amino acids, carbohydrates and a small amount of salivary acid, also called bird’s nest acid, as well as trace elements such as calcium, phosphorus, iron, sodium and potassium, and amino acids that play an important role in promoting human vitality, including those with lysine, cystine and arginine. Its protein content is relatively high, but should be similar to that of soy products. The unique protein composition also contains biologically active molecules that help the growth, development and rehabilitation of human tissues, etc.