Peptides are short chains of amino acids that play important roles in various biological processes in the body. They are often referred to as small proteins and can have a wide range of functions, including acting as hormones, neurotransmitters, and signaling molecules. Peptides are involved in many physiological processes, such as regulating metabolism, immune response, and cell growth. They are also being studied as potential therapeutic agents for a variety of conditions, including cancer, diabetes, and neurodegenerative diseases. Researchers are exploring the use of peptides in drug development, as well as in diagnostics and biomarker discovery. Overall, peptides are a diverse and promising area of research with many potential applications in medicine and biotechnology.