What is the purpose of a peptone in the media?

Peptone serves as a source of nitrogen, amino acids, and other essential nutrients in microbiological media, promoting the growth of bacteria and other microorganisms. It is derived from the hydrolysis of proteins, providing a complex mix of peptides and free amino acids that support metabolic processes. By enriching the culture medium, peptone helps sustain microbial growth and facilitates the production of metabolites during fermentation or other biological processes.