N-acetylneuraminic acid  (CAS No.: 131-48-6）, also known as sialic acid, is a natural carbohydrate compound that exists in the biological system. It was first isolated from the mucin of bovine mandibular salivary gland.

N-acetylneuraminic acid is widely distributed in mammalian tissues. Human brain tissue and human milk are rich in N-acetylneuraminic acid, which is 0.25~1.50g/L in human milk. In addition, N-acetylneuraminic acid also exists in our daily food, such as milk, dairy products, animal meat, eggs, etc. However, the content of N-acetylneuraminic acid in food is very low, and because of the complex nutritional components in food, the absorption rate and utilization rate of human body are very low, so people will seek exogenous supplement to meet the needs of body functional metabolism.

As a new food raw material, N-acetylneuraminic acid has the effect of improving immunity and promoting intellectual development in regulating the half-life of blood protein, combating various toxins, antioxidation, promoting the development of nerve cells, epithelial cells, and sputum free cells. Therefore, N-acetylneuraminic acid is an important component of human cell membrane protein. In addition to being used in the drug market, N-acetylneuraminic acid is also widely used in the infant formula food, health food, nutritional supplements and cosmetics market due to its physiological versatility.

As the main effective ingredient of cubilose, " N-acetylneuraminic acid" is a small molecule, which is easier to be absorbed than collagen peptide. It is generally used as a humectant in the cosmetics field. In fact, there are also many products on the market that focus on the concept of "cubilose", but most of the products use "cubilose extract" with low purity. However, our "N-acetylneuraminic acid", through fermentation, filtration, sterilization, hydrolysis, purification and other steps, can obtain a crystal product of N-acetylneuraminic acid with a purity of more than 98%, which is very different from those of "cubilose" products.