Sodium hyaluronate (CAS No.:9067-32-7) is an inherent component in the human body. It is a glucuronic acid with no species specificity. It widely exists in the placenta, amniotic fluid, lens, articular cartilage, skin dermis and other tissues; Distributed in the cytoplasm and intercellular substance, it lubricates and nourishes the cells and organ itself. Sodium hyaluronate can provide a microenvironment for cell metabolism, and a natural "hyaluronic acid" of the human body is combined with other to promote cell regeneration. Sodium hyaluronate has many functions in cosmetics:

1. Moisturizing

Moisturizing effect is the most important role of sodium hyaluronate in cosmetics. Experiments show that compared with other humectants, sodium hyaluronate has the highest moisture absorption at low relative humidity (33%) and the lowest at high relative humidity (75%). This unique property is adapting to the skin's requirements for the moisturizing effect of cosmetics in different seasons and different environmental humidity, such as dry winter and humid summer. The moisturizing property of sodium hyaluronate is related to its quality, the higher the quality, the better the moisturizing performance. Sodium hyaluronate is rarely used alone as a moisturizing agent, but is often used in combination with other moisturizing agents.

The moisture level of the skin is closely related to the content of hyaluronic acid. With the increase of age, the content of hyaluronic acid in the skin decreases, which weakens the skin's water-retaining function and causes wrinkles. The aqueous solution of sodium hyaluronate has strong viscoelasticity and lubricity, and when applied to the skin surface, it can form a moisturizing and breathable film to keep the skin moist and bright. Small molecule hyaluronic acid can penetrate into the dermis layer, promote blood microcirculation, slightly dilate capillaries, improve intermediate metabolism, facilitate the absorption of nutrients by the skin, achieve the effect of lubricating and plumping, and play a role in beauty and anti-wrinkle health care.

In addition, the combination of sodium hyaluronate, egf and heparin can accelerate the regeneration of epidermal cells, making the skin delicate, smooth and elastic. When the skin suffers from mild burns and scalds, applying a water-based cosmetic containing sodium hyaluronate on the surface can relieve pain and accelerate the healing of the injured part of the skin.

Sodium hyaluronate is a high molecular polymer with strong lubricity and film-forming properties. Skin care products containing sodium hyaluronate have an obvious lubricating feel when applied and feel good. After being applied to the skin, it can form a film on the surface of the skin, making the skin feel smooth and moisturizing, and protecting the skin. Hair care products containing sodium hyaluronate can form a film on the surface of the hair, which can moisturize, lubricate, protect the hair, eliminate static electricity, etc., making the hair easy to comb, elegant and natural.