Peptides form a very large part of the biological signaling mechanism. They carry information to cells and they are also major regulators of life. A peptide is a chemical compound composed of amino acids. Two or more amino acids linked together form a polypeptide. The amino acids are joined in a specific sequence by peptide bonds. According to how the peptides are joined, specific amino acids and proteins are formed. Peptides respond to cell receptors, are water soluble and cannot enter the cell. Their signal is transmitted to the DNA in the cell through the membrane receptor. Peptides are used in skin care to increase the amount of collagen being produced in the skin, stimulate fibroblast growth, and stimulate the production of keratinocytes. In other words, to minimize wrinkles and relax muscular activity. Matrixyl and Argireline are the most popular peptides currently in use but many more are becoming available. They are most effectively used in specific areas of the face like the eye area and orbicularis oris. The best method to apply them is in serum form and with the use of electrical protocols - for example, microcurrent, galvanism and ultrasound.
