Chitosan has excellent biocompatibility, film-forming, antimicrobial function, significant whitening results, moisture, stimulate cell regeneration and modification function for skins. It can be predicted that chitosan will play an important role in the field of cosmetics. Chitosans poly scientific name is off acetyl glucosamine and it is a polysaccharide polymer. Because astaxanthin and chitosan are extracted from crab and shrimp shell, it also commonly known as chitin or chitin. Chitosan was first used as a food additive. In recent years it has been used in cosmetics.
The chitosan used in cosmetics, has the following advantages: excellent biocompatibility and film. It can fully maintain the nutritional content of ceramide for the important ingredients of the coating on the component units of the chitosan component of glucosamine and human table sebum. The structure is very similar, so it can be interaction with the table sebum film, resulting in a layer of chitosan fat layer. Chitosan lipid films have excellent ductility, this feature of chitosan has been used in the manufacture of artificial skin, surgical sutures. Similarly, adding chitosan cosmetics, in the human epidermis to form a layer of natural bionic skin can fully maintain the active ingredient in cosmetics such as moisturizers and nourishment, and so because of its good permeability. In addition, the chitosan membranes in the human epidermis will form a natural barrier, such as ultraviolet and bacteria against the skin can block or weaken.
GAG inhibition of mold, bacteria and yeast has been used for fruit, fresh, cooked meat, such as Japan in the preservation of cooked meat has been widely use of chitosan, Italy can be with chitosan fresh fruit stored at room temperature for 1 year. Chitosan is used in cosmetics, permeable into the skin and hair follicle, inhibit and kill mold, bacteria and other harmful microbes hiding in the hair follicle. Thereby it eliminates the acne and dermatitis caused by micro-organisms against, at the same time to eliminate the accumulation due to microbial caused by melanin pigmentation. Chitosan itself can also inhibit the activity of the melanin formation enzyme, thereby eliminating the melanin caused by metabolic disorders. It can be said that whitening cosmetics of chitosan and glutathione has a very good performance.
Many water molecules, amino, excellent water absorption and water retention, such as the introduction of chemically modified chitosan (carboxymethyl chitosan macromolecules) can further improve its water holding capacity. Human skin due to sun, dry and aging and other reasons, will produce dry; with increasing age, the regeneration of human cells to slow down epidermal cell aggregation will produce gaps that we often say that the wrinkles, the use of cosmetics containing chitosan can not only provide nutrients to the skin such as collagen, and chitosan can be filled with dry cracks in the epidermis, and the role of ceramide in the table sebum film, and ultimately grow into one, and epidermal, in order to achieve the modification of the effect of beauty. In addition, chitosan is an excellent cell growth. Inducing factor has been widely used in the proliferation of animal and plant cell cultures. Used in cosmetics, it can stimulate to accelerate the speed of regeneration of epidermal cells, so as to achieve the effect of slow aging, modification of beauty.
Chitosan not only has important applications in skin care products, but also has an important use in hair care, bath and other daily necessities. With the chitosans excellent film-forming properties, it can be used in a variety of hair gel and shampoos. Chitosan is mainly extracted from shrimp or crab. This method has two drawbacks: First, the raw materials tretinoin and chitosan are collected subject to seasonal restrictions with high production costs. Second, because the raw material type, origin and production processes are different, chitosans quality is instable.