If you use too much at a time, it will lead to stuffy beans. However, Mei Xinyi is a medical beauty product, so it does little harm to human body.

Mei Xinyi is produced by a medical instrument factory in Hangzhou. Especially easy to use, fried chicken likes it. It has a good moisturizing effect. After painting, the face becomes soft and very moist. One is 15ml, with 2 drops each time, one drop is 0.2ml, and 2 drops can be applied to the whole face.

Encyclopedia of hyaluronic acid:

Hyaluronic acid (hyaluronic acid? Acid), also known as uronic acid and hyaluronic acid, is a glycosaminoglycan composed of disaccharides (D- glucuronic acid and N- acetylglucosamine) and is one of the main components of extracellular matrix.

Hyaluronic acid is an acidic mucopolysaccharide, which was first isolated from bovine vitreous by Meyer, an ophthalmologist at Columbia University in the United States, on 1934. Hyaluronic acid, with its unique molecular structure and physical and chemical properties, has many important physiological functions in vivo, such as lubricating joints, regulating the permeability of blood vessel walls, regulating the diffusion and operation of protein, water and electrolytes, and promoting wound healing.

Hyaluronic acid widely exists in connective tissue, epithelial tissue and nerve tissue. Unlike most glycosaminoglycans, hyaluronic acid does not contain sulfur, and is formed in cell membrane instead of high body, and its relative molecular weight can reach 106. Hyaluronic acid molecules can carry more than 500 times of water, which is recognized as the best moisturizing ingredient today and widely used in skin care products and cosmetics.

More importantly, hyaluronic acid has a special water retention function and is the best moisturizing substance found in nature at present. It is called an ideal natural moisturizing factor (NMF, for example, 2% pure hyaluronic acid aqueous solution can firmly maintain 98% moisture.

Refer to the above content: Baidu Encyclopedia-Hyaluronic Acid.