Saccharomyces cerevisiae is a yeast species with a long history in human life. It is known that it was isolated from the grape skin. After being discovered, it has been widely used in the food industry for baking or food. So it`s also called baker`s yeast or brewer`s yeast.

Baker`s yeast contains a lot of protein, nucleic acid, carbohydrates, minerals, and vitamins, and surplus yeast after beer manufacture is used as a health agent in the form of dry yeast. According to a study, beer yeast contains 2.67 times more protein than beef and 8.91 times more than milk.