Yeast extract is a natural ingredient commonly used in sauces and mayonnaise. It is made from yeast cells that have been broken down and processed to extract flavorful components. Yeast extract offers a savory and umami taste, enhancing the overall flavor profile of the condiments. It can contribute to a rich and robust flavor, similar to that of meat or broth, making it a popular choice for adding depth and complexity to sauces and mayonnaise. Additionally, yeast extract is often used as a flavor enhancer in vegetarian or vegan products, providing a savory note without the use of animal-derived ingredients.