In fact, peptides have become very popular in skin care products in the United States and other countries, and are used by many cosmeceutical brands. Nowadays, not only cosmeceuticals, but also world-renowned cosmetic brands such as T.O.F, Estee Lauder, Lancome and CD have also launched peptide-containing skin care products. Because of its high price, products added with "peptide" are regarded as high-end cosmetics.
Peptides are peptides.
What is peptide and what effect does it have on human body?
According to reports, Peptide is peptide, which is translated into "peptide" or "peptide" in Chinese. Perhaps consumers are familiar with the word "peptide", so when it is used in cosmetics, it appears in the form of "peptide". For the public, this not only has a fresh and mysterious feeling, but also seems to be the representative of high technology.
In fact, peptide is also a component existing in human body, which is a chain structure formed by amino acids. The protein we are familiar with is a polypeptide. Generally speaking, peptides are polymers formed by dehydration and condensation of more than two amino acids. The carboxyl group of the first amino acid molecule condenses with the amino group of the second amino acid molecule to remove a water molecule and form a * * * valence peptide bond, which is called dipeptide; The condensation of three amino acids is called sansheng peptide, etc. Generally, peptides with less than 10 amino acids are called oligopeptides, those with more amino acids are called polypeptides, and those with more than 50 amino acids are called protein. There is no uniform definition for the number of amino acids in oligopeptide, polypeptide and protein. Because of the different varieties of amino acids, there are also different varieties of dipeptide and tripeptide, so there are "peptides" with various functions and names.
It is understood that peptides participate in the growth and reproduction of hormones, nerves and cells in human body, and its importance lies in regulating the physiological functions of various systems and cells in the body, activating related enzyme systems in the body, promoting the permeability of intermediate metabolic membranes, or controlling DNA transcription or influencing specific protein synthesis, and finally producing specific physiological effects.
The Beauty Function of Sacred Peptide in Cosmetics
The biological activity of peptides depends on their amino acid composition and sequence, and almost all physiological processes in human body are regulated by peptides or protein composed of specific amino acid sequences. Therefore, bioactive peptides have become a new direction and new idea in cosmetics research and application, and their functions are increasingly subdivided, such as anti-aging, repair, anti-oxidation, anti-edema, promoting hair regeneration, inhibiting melanin production, breast enhancement, weight loss and so on.
Skin is a natural barrier for human body to resist the invasion of external environment, and it has a certain protective effect on external stimuli, thanks to the protective effect of dense stratum corneum. However, it also prevents the nutrients of cosmetics from entering the skin surface. Nutrition needs to penetrate the cell membrane of stratum corneum to enter the dermis, and 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 skin surface, and bioactive beauty peptides can easily enter the dermis through the gap between the cuticles, thus playing a role.
At first, Shengtai was directly used in products by some European and American cosmeceuticals. Its mechanism of action is similar to that of protein, which can promote the proliferation of collagen, elastic fiber and hyaluronic acid, increase skin moisture content, increase skin thickness and reduce fine lines. Because of the different kinds of amino acids, they can play different roles and meet the needs of different skin functions. At present, the common peptides in the market are sansheng peptide, wusheng peptide and Liu Sheng peptide, and their functions are as follows:
Botulinum-like peptide can relax facial muscles and smooth dynamic lines, static lines and fine lines caused by muscle tension.
Peptides such as growth factors can prevent nerve conduction, improve dynamic lines, repair wounds and eliminate skin inflammation.
Peptides such as promoting circulation and antioxidation have the effect of eliminating edema. Can promote cell microcirculation and blood circulation; And help cells resist carbonylation, oxidation and saccharification.
In addition, Shengtai can improve microcirculation, strengthen blood circulation, improve eye edema and eliminate inflammation; Inhibit tyrosinase activity and block the transmission of melanin to stratum corneum; Polypeptides with the functions of promoting hair growth, skin repair, wound healing, breast enhancement and weight loss have appeared in the market.
Another is to divide the functions of peptides into: Sansheng peptide is growth factor, Tetrasheng peptide has anti-inflammatory effect, Pentsheng peptide can promote collagen to increase skin thickness, Hexene peptide is botulinum toxin, which can relax wrinkles, Jiusheng peptide can block melanotropin and has whitening effect. In fact, this classification is unscientific. Take Sansheng peptide as an example, it only shows three kinds of amino acids, but there are many kinds of amino acids, including 18. According to the sequence and composition length of amino acids, there may be thousands of peptides. If we don't explain the kinds and arrangement of amino acids, we can't talk about their functions.
You should know well when buying cosmetics containing peptides.
Nowadays, bioactive cosmetic peptides are used more and more in cosmetics. With the progress of molecular biology, biochemistry and gene technology, there will be more polypeptides with new uses and better effects, and the application prospect of polypeptides in cosmetics is broad. People gradually realize that adding peptides with different functions into cosmetics can achieve better maintenance effect.
It should be noted that the high price will inevitably make merchants happy to use it in high-end skin care products, but consumers generally don't know the concentration of peptides added in the products, so there are many low-concentration peptide cosmetics on the market that pretend to be high-end products. In fact, the greater the content of peptides, the greater the efficacy. The key to the efficacy of peptides includes the type, quantity and the way of interconnection.
And a better cosmetic should pay attention to whether there are moisturizing, antioxidant and repairing ingredients besides peptides. Such as acid A and ester A, can not only repair wrinkles, but also promote the new metabolism of keratin, which is far better than a single peptide component. As for moisturizing hyaluronic acid, collagen and sunscreen products, they must be effective with the help of macromolecules, and they don't need to penetrate into the bottom of the skin to play their role, so they can stay on the surface of the skin.