A polypeptide is a small molecule made up of 2 to 50 amino acids linked by peptide bonds. It falls between amino acids and proteins in structure. Polypeptides are highly permeable and biologically active, making them essential to the human body.
The unique structure of each polypeptide—shaped by different amino acid sequences—directly determines its specific biological activity. This makes polypeptides widely used in clinical medicine for treating various diseases, while also delivering exceptional results in skincare and personal care.