Proteose, also known as proteolytic enzyme, is a protein molecule that is broken down by enzymes in the body. Synonyms for proteose include protein hydrolysate, peptone, and proteolytic digest. These terms are commonly used in the food industry to describe protein products that have been modified or partially broken down for use as ingredients in products such as energy bars, protein supplements, and baby formulas. Peptones are used in microbiology to provide a source of nutrients for bacteria and other organisms. Protein hydrolysates are also used in livestock and aquaculture feed to improve digestibility, promote growth, and enhance animal health.