Yeast extract is a flavor additive commonly used in snacks, cheese, soups, sauces, and seasonings to add a more savory flavor. It is produced commercially through a process involving yeast fermentation and extraction, in which a specific strain of yeast is cultivated in a nutrient-rich medium. The yeast cells multiply and consume the nutrients, producing proteins, vitamins, and flavor-enhancing compounds. The fermentation process is then stopped, and the yeast cells are separated using heat treatment, centrifugation, and filtration. This process removes the cell walls and other undesirable components, leaving behind a concentrated liquid or paste as yeast extract.