Proteose peptone is widely used in microbiological culture media as a rich source of nitrogen, amino acids, and peptides to support the growth of a variety of microorganisms. It is particularly valuable in the cultivation of fastidious bacteria and other microbes that require complex nutrients. Due to its high nutritional content, it is commonly included in media for the production of antibiotics, enzymes, and other microbial metabolites. It also finds application in fermentation processes where consistent and reliable growth support is essential. In addition, proteose peptone is used in research settings for studying bacterial metabolism, protein expression, and in the development of diagnostic culture systems.