*The article was translated into English using automatic translation. The editors are working on its improvement.
Peptides (from the Greek πεπτος - nutritious) are substances whose molecules are built from alpha amino acid residues connected in a chain by a certain type of bond (peptide/amide bonds).
A peptide (amide) bond is a type of chemical bond that occurs when the alpha-amino group of one amino acid interacts with the alpha-carboxy group of another amino acid. The peptide bond is very strong, and under normal cellular conditions (37 °C, neutral pH) does not break spontaneously, but is destroyed only under the action of special enzymes.
Regulation and coordination of all processes at the cellular level occurs thanks to signaling substances that transmit the necessary information. Most of these signaling substances are peptides, some of which are successfully used in cosmetics. The study and use of peptides has made it possible to raise modern cosmetology to a qualitatively new level.