Hyaluronic acid is an acidic mucopolysaccharide, and Meyer et al., A professor of ophthalmology at Columbia University in 1934, first isolated the substance from the bovine vitreous. Hyaluronic acid with its unique molecular structure and physicochemical properties in the body showed a variety of important physiological functions, such as lubricating the joints, regulating the permeability of the vascular wall, regulating protein, water and electrolyte diffusion and operation, and promote wound healing. More importantly, hyaluronic acid has a special water-retaining effect and is currently found to have the best moisturizing property in nature. It is also known as the ideal natural moisturizing factor (NMF, for example, 2% pure hyaluronan Hyaluronic acid is a multi-functional matrix, hyaluronic acid (hyaluronic acid) HA is widely distributed in various parts of the body which also contains a lot of skin hyaluronic acid. Human skin maturation and aging process It also changes with the content of hyaluronic acid and metabolism, it can improve the skin nutrition and metabolism, make the skin soft, smooth, wrinkle, increase elasticity, prevent aging, while moisturizing is a good transdermal absorption accelerator. The combination of other nutrients, can play a more ideal effect of promoting nutrient absorption.