Sialic acid, colloquially known as N-acetyl Beta-neuraminic acid. We all know that the main functional characteristic of the traditional tonic bird's nest is sialic acid. Because the content of sialic acid in bird's nest is as high as 7% to 11% , so sialic acid is also known as bird's nest acid. Bird's nest acid is also a component of human milk oligosaccharides in human milk. Medical Research has found that sialic acid is an essential nutrient in the human body and is one of the essential ingredients in breast milk for infants. Can be called the human body intelligence development“Brain gold”.