The role of polypeptides in cosmetics The biological activity of polypeptides depends on their amino acid composition and sequence.
Almost all physiological processes in the human body are regulated by polypeptides or proteins composed of specific amino acid sequences. Therefore, biologically active peptides have become a new direction and idea for the development and application of cosmetics, and their functions are becoming more and more subdivided, such as: anti-aging, anti-allergic, repairing, anti-oxidation, anti-edema, promoting hair regeneration, inhibiting melanin production, and breast enhancement , Weight loss, etc.
The skin is the human body’s natural barrier against external environmental aggressions, and has a certain protective effect against external stimuli, thanks to the protective effect of the skin’s dense stratum corneum.
However, the nutrients of cosmetics are also blocked on the surface of the skin. Nutrients need to penetrate the stratum corneum cell membrane to enter the dermis. Only a small amount of macromolecules and fat-soluble substances can be absorbed through pores and sweat pores.
Therefore, most of the cosmetics we usually use only stay on the surface of the skin, while the biologically active beauty peptides can easily pass through the stratum corneum and enter the dermis, thereby playing a role. Peptides were originally used directly in products by some European and American cosmeceuticals.
The mechanism of action is similar to that of protein. It can promote the proliferation of collagen, elastic fiber, polysaccharides and hyaluronic acid, increase skin moisture content, increase skin thickness and reduce fineness. Pattern. Due to the different types of amino acids contained, they can play different roles to meet the needs of different functions of the skin.
What is the difference between type I II III recombinant human collagen? Human collagen is divided into more than 28 types of collagen according to different tissue locations, physiological functions, and molecular structures. The most studied collagen types are type I, type II, and type III.
The collagen in human skin is type I collagen and type III collagen.
Collagen type I: mainly found in adult skin, tendons, and bone tissues.
Collagen type III: mainly exists in infant skin or vascular intima and intestinal tract.
Type II collagen mainly exists in cartilage, vitreous, intervertebral disc, etc.
Very soluble means that the solute lg (ml) can be dissolved in less than 1ml of solvent; soluble means that the solute lg (ml) can be dissolved in solvent 1?
Dissolve in less than 10ml; dissolution means that the solute lg (ml) can be dissolved in the solvent 10?
Dissolve in less than 30ml; slightly soluble means that the solute lg (ml) can be dissolved in less than 100ml of solvent;
Slightly soluble means that the solute lg (ml) can be in the solvent 100?
Dissolve in less than 1000ml; very slightly soluble means that the solute lg (ml) can be dissolved in a solvent of 1000?
It dissolves in less than 10000ml; almost insoluble or insoluble means that the solute lg (ml) cannot be completely dissolved in 10000ml of solvent.