Broken swallow has the same effect as bird's nest. Broken swallow is a part of bird's nest, but its efficacy is not as good as bird's nest, which contains more nutrients. Minced Yan is relatively cheap, which is economical and can supplement nutrition. Bird's nest and broken swallow belong to the category of tonics and are not recommended for children.
Bird's Nest refers to a nest made of saliva secreted by some Swifts of Swift Family of Swift Order and several Jin Siyan species of Swift genus, and then mixed with other substances. Bird's nest, also known as swallow, swallow root and swallow dish, can be divided into house swallow and cave swallow according to the nesting place. Dongyan has different colors due to the influence of minerals, including Bai Yan, Huangyan and Hongyan, while domestic swallow has only one ivory color. The so-called blood swallow in the market is said to be a domestic swallow raised artificially and made of bird droppings.