Yeast is a unicellular fungus, not a unit of phylogenetic classification. A tiny single-celled microorganism invisible to the naked eye can ferment sugar into alcohol and carbon dioxide, which are distributed throughout nature. It is a typical heterotrophic and facultative anaerobic microorganism, which can survive under aerobic and anaerobic conditions and is a natural starter.

Yeast fermentation is completed through the biological process of yeast fermentation, which improves the nutritional value.

Yeast is divided into fresh yeast and dry yeast. It is an edible and nutrient-rich single-celled microorganism, which is called "inexhaustible nutrient source" in nutrition. Besides protein, carbohydrates and lipids, yeast is also rich in vitamins, minerals and enzymes.

Experiments show that the content of protein per 1 kg of dry yeast is equivalent to that of protein in 5 kg of rice, 2 kg of soybean or 2.5 kg of pork. Therefore, the nutritional content of steamed bread and bread is 3-4 times higher than that of cakes and noodles without dough, and nearly 2 times higher in protein.

Extended data

eat

The United States, Japan and some European countries add about 5% edible yeast powder to common foods such as bread, cakes, biscuits and scones to improve the nutritional value of food.

Yeast autolysate can be used as an additive for meat, jam, soup, cheese, bread, vegetables and condiments. It is used as a food nutrition enhancer in baby food and health food.

The 5'- nucleotide prepared from yeast autolysis extract can be used as an additive in combination with monosodium glutamate to enhance the flavor of food.

The concentrated invertase extracted from yeast is used as liquefier for chocolate with square eggs.

Extracting lactase from yeast produced in whey can be used to increase sweetness in milk processing, prevent lactose crystallization in whey concentrated solution, and meet the needs of lactose intolerant consumers.

officinal

The manufacturing method and properties are the same as those of food yeast. Because it is rich in protein, vitamins, enzymes and other physiological active substances, it is made into yeast tablets, such as raw mother tablets, to treat indigestion caused by unreasonable diet.

People with weak constitution can regulate metabolic function to some extent after taking it. In the process of yeast culture, if some special elements are added to make the yeast contain trace elements such as selenium and chromium, it will have certain curative effect on some diseases. If selenium-containing yeast is used to treat Keshan disease and Kaschin-Beck disease, it can prevent cell aging to some extent; Chromium-containing yeast can be used to treat diabetes.

Baidu Encyclopedia-Yeast