The moisturizing effect of sodium hyaluronate is the most important function in cosmetics. Compared with other humectants, the relative humidity of the surrounding environment has little influence on its moisturizing effect. The humectants commonly used in cosmetics include glycerol, propylene glycol, sorbitol, polyethylene glycol, sodium lactate, sodium pyrrolidone carboxylate, etc.

The moisture level of the skin is closely related to the hyaluronic acid content. With the increase of age, the hyaluronic acid content in the skin decreases, which weakens the skin's water retention function and produces wrinkles. Sodium hyaluronate aqueous solution has strong viscoelasticity and lubricity. When applied to the skin surface, it can form a moisturizing and breathable film to keep the skin moist and shiny. Small molecular hyaluronic acid can penetrate into the dermis, promote blood microcirculation, help the skin absorb nutrients, and play a health care role in beauty and wrinkle resistance.

film forming and lubricity. It belongs to high molecular polymer, and it has obvious lubricating feeling and good hand feeling when applied. Macromolecules form a breathable film on the skin surface, which makes the skin smooth and moist, and blocks the invasion of foreign bacteria and dust. Small molecular sodium hyaluronate can penetrate into the dermis, which has the functions of slightly dilating capillaries, increasing blood circulation, improving intermediate metabolism, promoting skin nutrient absorption, and achieving lubrication and fullness.

sun protection and skin damage repair. On the skin surface, it can eliminate reactive oxygen free radicals generated by ultraviolet radiation in the sun, protect the skin from ultraviolet damage, and promote skin regeneration at the injured part by promoting the proliferation and differentiation of epidermal cells.