Views:11 Author:Site Editor Publish Time: 2020-07-07 Origin:Site
Hyaluronic acid is used in cosmetics to play a unique role in protecting the skin. It can keep the skin moist and smooth, delicate and tender, full of elasticity, and has the functions of anti-wrinkle, anti-wrinkle, beauty care and restoration of skin physiological functions.
1. Keep your skin young
Hyaluronic acid itself is an extremely important part of skin health, and the use of hyaluronic acid essence can adjust the condition of the skin from the outside to the inside, making the skin more full and firm, full of natural vitality and luster.
2. Lock skin moisture
The biggest role of hyaluronic acid is to replenish water, while effectively replenishing water, it can also effectively lock in moisture to prevent loss, so that the skin will appear hydrated and full healthy state every day, maintaining the skin's water-oil balance.
3. Delay aging
Hyaluronic acid essence helps repair fine lines and other problems caused by skin aging, improves the health of the skin, and has a good repair effect for some problems such as dry skin.
The source of hyaluronic acid (scientific name hyaluronic acid):
1. Animal tissue:
The main raw materials are cockscomb and bull's eye vitreous, etc. The raw materials are degreased and dehydrated with acetone or ethanol, soaked and filtered with distilled water, and then treated with an aqueous solution of sodium chloride and chloroform, and then mixed with trypsin to obtain a mixed solution Finally, it is processed and purified with ion exchanger to obtain refined hyaluronic acid. The extraction rate of this method is extremely low, only about 1%, and the separation process is complicated, which makes hyaluronic acid expensive, reaching $5,000/kg, which is limited to Used in large amounts in cosmetics.
2. Microbial fermentation:
Fermentation broth with glucose as the carbon source. Fermentation in the medium for 48 hours. After the fermentation is completed, the mycelium and impurities are removed by filtration, and then a high-purity product is obtained by simple operations such as alcohol precipitation. The advantage of hyaluronic acid produced by the method is that the molecular weight can be set according to the product design. The key to the fermentation method is the choice of strains, and most of them are streptococcus and lactococcus.
3. Chemical synthesis:
A natural enzyme polymerization reaction is used; firstly, a polysaccharide polymer is used to synthesize "hyaluronan oxacyclopentene derivative", then a water-decomposing enzyme is added to produce a derivative and enzyme complex, and finally Hyaluronic acid is synthesized by removing the enzyme in the 90-degree Celsius reaction solution. The artificial synthesis method can greatly reduce the manufacturing cost of hyaluronic acid, but the structure is less pure.