Nutritional yeast is a deactivated yeast that vegans use to thicken sauces and, in fact, it only mimics the flavor of Parmesan cheese and also has a nutty flavor. Active dry yeast is an activated yeast used in breads to make them rise. In short, the difference between nutritional yeast and active dry yeast is that one is an ingredient and the other is a condiment. Active dry yeast is used in baking to make dough rise, while nutritional yeast is a condiment used by vegans as an alternative to cheese.
When active, dry yeast eats sugar and starch and releases bubbles of carbon dioxide and alcohol, causing the dough to rise. The dry, active yeast remains dormant in the package, but it is easily activated by adding warm water and sometimes a little sugar. Nutritional yeast is the same organism, but it has been heated to such a high temperature that it is no longer alive or active. Find it in crumbled form or in flakes at health food stores.
For people new to vegan cooking, neither the word “nutrition” nor the word “yeast” would conjure up a delicious image. Although WebMD classifies nutritional yeast as safe for most people, it carries some potential risks. Now, let's move on to nutritional yeast, one scoop contains 6 grams of protein, plus 5 grams of carbohydrates and 3 grams of fiber (via Livestrong). Nutritional yeast is deactivated yeast, so it doesn't make things grow and doesn't replace yeast when baking.
Spina bifida and other serious birth defects in pregnant women can be prevented by consuming folic acid, which is also one of the ingredients in nutritional yeasts. Vegans and vegetarians often consume nutritional yeast to get vitamin B12, an essential vitamin found primarily in meat and poultry. Because it has been deactivated, nutritional yeast will not grow inside you and could improve your nutritional status. Nutritional yeast is made from the same organism as active dry yeast, but it's used in a very different way.
And as The Spruce Eats explains, nutritional yeast requires very little maintenance and there's no need to test it before adding it to a recipe, since it's not alive. The biggest difference between nutritional yeast and active dry yeast is that nutritional yeast is a type of inactive yeast that isn't alive. Nutritional yeast, on the other hand, is a dead yeast, according to Bon Appétit, which is often used to provide a creamy texture and a cheese-like flavor in products such as pasta and popcorn. When fortified with vitamin B12, nutritional yeast can be very beneficial for vegans and vegetarians, who don't normally get enough of this vitamin in their diet.
It also offers small amounts of calcium, B vitamins, and potassium, but when distributed in a whole loaf of bread, the effect on nutritional status is minimal. Nutritional yeast is a deactivated yeast that is used, especially by vegans, to thicken sauces and imitate the flavor of Parmesan cheese. Nutritional yeast is a good vegan source of B vitamins and adds a pleasant cheesy flavor to raw food salads.