Main menu


Yeast: Types - Uses - Damage - Sources - Industry

Yeast: Types - Uses - Damage - Sources - Industry  What is yeast?



Yeast is a single-celled microscopic organisms, belonging to the kingdom of fungi, and they are found throughout nature, and live in soil, vegetation, aquatic systems, and the bodies of humans and animals. Scientists have discovered about 1500 types of yeast, which constitute about 1% of all kinds of fungi.

Yeast multiplies rapidly when sugar is available in a humid environment, and also feeds on starch, which turns into glucose.[2] It is noteworthy that 450 g of yeast contains 3200 billion cells,[2] and most types of yeast reproduce asexually, by budding. There are a few types of yeast that reproduce by fission, so that the mother cell divides into two equal cells, and like fungi, yeast is a eukaryotic organism. which are usually only about 0.075 mm in diameter.[3]



Some types of yeast and their uses

1. Brewer's Yeast

Yeast is made from a fungus called Saccharomyces cerevisiae. It is the most common type of food supplement. It is a rich source of minerals, such as: selenium, vitamin B, and chromium, a mineral that helps maintain blood sugar levels. [4]


2. Baker's Yeast

It is used as a leavening agent for bread, as it increases the volume of dough during baking, by consuming sugar in the dough, and excreting carbon dioxide and ethanol, which causes air bubbles to form in the dough, which is called the fermentation process. It is worth noting that this yeast is rich in minerals and folic.[4]


3. Nutritional Yeast

It is used to add cheese flavor and nutritional value to meals, as it contains B vitamins and selenium, and is available in the form of flakes, powder, or liquids.[4]



The importance of yeast and its uses

1.      Yeast is used in many food industries; Such as the bread industry, the vitamin industry, milk, and cheese, and its benefits include the production of single-celled protein, fat, glycerin, enzymes, and industrial alcohol.


2.     It is nutritionally and medically beneficial; Yeast is rich in iron, and helps patients with anemia (iron deficiency anemia) to treat, and also helps treat cholesterol; Where a small piece of yeast can be dissolved in the blood, and yeast provides prevention of cardiovascular diseases, as well as those who suffer from laziness, as yeast has an effective effect in treating laziness and stimulating blood circulation. As for sleep, yeast eliminates insomnia and helps you sleep comfortably and relax, and yeast also protects you from diabetes and cancer, improves mood, and is useful in treating gout and obesity; Since in the presence of yeast you quickly feel full, and yeast provides you with many organic vitamins except for vitamin B12, and also provides you with minerals, protein, amino acids, phosphorus, chromium, zinc, potassium, and nickel acid, and is considered a soothing nerve, and a treatment for the intestines, migraines, headaches and skin allergies, It strengthens the immune system, and helps in the growth of the body and the renewal of tissues.


3.     It is useful in the field of skin and beauty; Yeast is useful in removing acne, lightening the skin, and losing weight, and yeast is used to puff the cheeks and face, and delay the manifestations of aging.


It is useful in the pharmaceutical industry; Yeast is very important in the pharmaceutical industry, especially penicillin. It should be noted that the French scientist Louis Pasteur provided a great service to the world when he discovered the phenomenon of fermentation, and he was able to clarify it so that scientists were recently able to control the fermentation.



Yeast damage

Yeast is harmful to those who are allergic to yeasts, and to those who suffer from high blood pressure, and may cause gas and bloating in the abdomen, and may lead to a decrease in sugar in diabetics when increased intake. Be careful when taking yeast from the low level of calcium in the blood; Because it expels it from the body, so it is recommended to add calcium to your diet.



Yeast sources

1.      Brewers yeast: It is a type of yeast resulting from the process of making beer from hops, and it is considered a nutritional yeast.


2.     Torula yeast: It is a yeast that grows on wood pulp that is used to make molasses.


3.     Whey yeast: The yeast produced by mixing milk and cheese.


4.     Liquid yeast: Natural yeasts resulting from feeding on some types of fruits such as oranges and grapefruit, and they are produced in Switzerland and Germany.



Bread yeast industry

1. Milk


1.      Sour milk, or buttermilk.

2.     White flour.



1.      Put the milk and flour in a deep bowl, and mix them together until a soft dough is formed.

2.     Cover the dough with a piece of nylon, then put it in a warm place for an hour until it ferments.

3.     Take a quantity of dough and add it to the dough to be fermented.



2. Dates and barley flour


1.      Barley flour.

2.     Seedless dates.

3.     lukewarm water


How to prepare:

1.      Knead barley flour with lukewarm water.

2.     Shape the dough into flat and thin discs.

3.     Put a date grain on the surface of each dough disk.

4.     Cover the dough disks with a clean cloth and leave them for five hours in a warm place. Remove the dates from the dough, then knead it again.

5.     Cover the dough with a clean cloth and leave it overnight to ferment.

6.     You can replace dates with raisins, dried figs, or dried or dried green beans.



3. White and brown flour



1.      Half a cup of white flour.

2.     Half a cup of brown flour.

3.     lukewarm water


How to prepare:

1.      Mix the white and brown flour in a deep bowl.

2.     Knead the flour with water until a sticky dough is formed.

3.     Cover the dough with a piece of nylon paper, then put it in a warm place for four days until it ferments.

4.     You can store the resulting yeast for twenty days in the refrigerator.



4. Flour, salt and water

The ingredients:

1.      A cup of white flour.

2.     Pinch of salt.

3.     lukewarm water


How to prepare:

1.      Knead the flour with water and salt in the usual way until you get a soft dough.

2.     Cover the dough with a clean cloth and put it in a warm place for twenty-four hours.

3.     Keep the resulting yeast in the refrigerator until use.

4.     You can use the paste for a month from the date it was made.





1.      Joseph Castro (20-12-2013), "What Is Yeast?"،, Retrieved 12-3-2018. Edited.

2.     PEGGY TROWBRIDGE FILIPPONE (10-3-2017), "Leavening - What is Yeast?"،, Retrieved 12-3-2018. Edited.

3.     "Yeast",, Retrieved 12-3-2018. Edited.

4.     JANET RENEE (3-10-2017), "Is Eating Yeast Bad for You?"،, Retrieved 12-3-2018. Edited.