Peptone is a water-soluble mixture of peptides and amino acids that is derived from the hydrolysis of proteins. It is commonly used as a nutrient source in microbiological culture media, providing essential building blocks for the growth of bacteria and fungi. Peptone is typically produced by digesting animal or plant proteins using enzymes or acids. In laboratory settings, peptone is often included in media formulations, such as nutrient broth and tryptic soy agar, to support the cultivation of microorganisms. Its ability to promote growth makes it a valuable component in research, diagnostics, and industrial applications, including the production of antibiotics and vaccines.