DESCRIPTION
Nutritional yeast is made from a single-celled organism, Saccharomyces Cerevisiae, which is grown on molasses and then harvested, washed, and dried with heat to kill or “deactivate” it. Because it’s inactive, it doesn’t froth or grow like baking yeast does so it has no leavening ability. Don’t worry; no animals are harmed in this process because yeasts are members of the fungi family, like mushrooms, not animals.
Nutritional yeast has such an unappealing name that somebody started calling it “nooch” and the name caught on on the internet. The brand that most vegans use is Red Star Vegetarian Support Formula because it is a good source of vitamin B12 and contains no whey, an animal product that is used in some other brands.