Used as a flavor enhancer in food products, yeast extract improves taste by providing umami and savory notes. It is commonly found in soups, sauces, snacks, and processed meats. Due to its high content of amino acids, peptides, and nucleotides, it boosts palatability and masks bitterness.

In animal feed, it serves as an additive to enhance immunity and promote growth, particularly in poultry and aquaculture.

In microbiology, biotechnology, and pharmaceuticals, it acts as a nutrient source in culture media for growing bacteria, fungi, and other microorganisms, owing to its richness in vitamins, minerals, amino acids, and peptides.

It is also used in dietary supplements, plant growth stimulants, and cosmetics for skin and hair care, where its antioxidants and proteins help moisturize skin, reduce inflammation, and provide nourishment.