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Nutritional yeast is a deactivated yeast, often a strain of ''Saccharomyces cerevisiae'', which is sold commercially as a food product. It is sold in the form of flakes or as a yellow powder and can be found in the bulk aisle of most natural food stores. It is popular with vegans and vegetarians and may be used as an ingredient in recipes or as a condiment. While it contains trace amounts of several vitamins and minerals, it is only a significant source of some B-complex vitamins. Sometimes nutritional yeast is fortified with vitamin B12. Nutritional yeast has a strong flavor that is described as nutty, cheesy, or creamy, which makes it popular as an ingredient in cheese substitutes. It is often used by vegans in place of cheese. It can be used in many recipes in place of cheese, such as in mashed and fried potatoes, and atop scrambled tofu. Another popular use is as a topping for popcorn. In Australia, it is sometimes sold as "savoury yeast flakes." In New Zealand, it has long been known as Brufax. In the United States it is sometimes referred to as "nooch" (also spelled nüch), or "yeshi," an Ethiopian name meaning "for a thousand". Though "nutritional yeast" usually refers to commercial products, inadequately fed prisoners of war have used "home-grown" yeast to prevent vitamin deficiency.〔J G Lee (HARUKOE (HARUKU) )〕 Nutritional yeast is different from yeast extract, which has a very strong flavour and comes in the form of a dark brown paste. == Commercial production == Nutritional yeast is produced by culturing a yeast in a nutrient medium for several days. The primary ingredient in the growth medium is glucose, often from either sugarcane or beet molasses. When the yeast is ready, it is killed (deactivated) with heat and then harvested, washed, dried and packaged. The species of yeast used is often a strain of ''Saccharomyces cerevisiae''. The strains are cultured and selected for desirable characteristics, and often exhibit a different phenotype from strains of ''S. cerevisiae'' used in baking and brewing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nutritional yeast」の詳細全文を読む スポンサード リンク
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