Hyaluronic acid can not only keep the skin elastic, but also lock a large number of water molecules, which can moisturize and lubricate tissues and make the skin full, young and elastic.
Hyaluronic acid is a linear macromolecular polysaccharide composed of disaccharide units (glucuronic acid -N- ethylthioglucosamine), which is a naturally occurring substance in tissues. Hyaluronic acid exists in connective tissue and dermis of human body, and it is a transparent colloidal substance with powerful moisturizing function. Hyaluronic acid of 1g can absorb 500C c. C water, equivalent to 500 times the water absorption capacity of glycerol. Widely distributed in connective tissue, mucous tissue, eyeball lens and some bacteria in nature, it plays an important role in the dermis of human skin, and plays an important role in the overall maintenance of tissue structure and the transportation between cells. According to the different maintenance time, it can be divided into small particles and large particles of hyaluronic acid. From 2065438 to September 2004, the State Food and Drug Administration of the United States strictly investigated the illegal acts of hyaluronic acid for injection.