Nutritional yeast is a deactivated yeast product that is commonly used as a flavor enhancer in vegan and plant-based cooking. It has a cheesy, nutty flavor that can be used to add depth and richness to a variety of dishes. Nutritional yeast is a good source of protein, fiber, and several vitamins and minerals, making it a healthy addition to your diet. It can be used in recipes for popcorn, pasta dishes, vegan cheese, and many other delicious meals.