Hyaluronic acid is an acid Mucopolysaccharide, 1934 United States Colombia University Ophthalmology Professor Meyer first isolated from bovine vitreous substance. Hyaluronic acid for its unique molecular structure and physicochemical properties of showing a variety of important physiological functions in the body, such as lubricating joints, regulate blood vessel wall permeability, regulating protein, electrolyte diffusion and running water, to promote wound healing. Particularly important is, hyaluronic acid has a special water effects, is found in the nature of moisture the best material, known as the ideal of natural moisturizing factors (Natural moisturizing factor,NMF, for example: 2% pure hyaluronic acid aqueous solution to securely hold the 98% water. Hyaluronic acid is a powerful matrix, Hyaluronan (hyaluronic acid) HA is widely distributed in various parts of the human body. Skin also contains large amounts of hyaluronic acid. Human maturation and aging process of the skin change as the content and metabolism of hyaluronic acid, it can improve skin metabolism, makes the skin soft, smooth, crease, increase flexibility, prevents aging, while moisturizing and good transdermal absorption enhancers. Used in conjunction with other nutrients, can serve as a catalyst for better nutrition absorption effect.