Human peptides are short chains of amino acids, which are the building blocks of proteins. They play crucial roles in various biological processes, including hormone regulation, immune response, and cell signaling. Peptides can be naturally occurring in the body or synthesized for therapeutic purposes. These molecules are important in medicine and research, as they can be used to develop drugs and treatments for various conditions. For example, insulin is a peptide hormone that regulates blood sugar levels, while other peptides are being studied for their potential in treating diseases like cancer and diabetes.