Bakers yeast is the common name for the strains of yeast commonly used as a leavening agent in baking bread and related products, where it converts the fermentable sugars present in the dough into carbon dioxide and ethanol. The use of potatoes, water from potato boiling, eggs, or sugar in a bread dough accelerates the growth of yeasts. Salt and fats such as butter slow down yeast growth. The majority of the yeast used in baking is Saccharomyces cerevisiae, the same species commonly used in alcoholic fermentation. Additionally, Saccharomyces exiguus (also known as S. minor) is a wild yeast found on plants, fruits, and grains that is occasionally used for baking; it is not, however, generally used in a pure form, but comes from being propagated in a sourdough starter. Yeasts are single-celled fungi. As fungi, they are related to the other fungi that people are more familiar with. These include edible mushrooms available at the super market, common bakers yeast used to leaves bread, molds that ripen blue cheese and the molds that produce antibiotics for medical and veterinary use. Many consider edible yeast and fungi to be as natural as fruits and vegetables. Bakers yeast, like baking powder and baking soda, is used to leaven baked goods (breads, danish pastries, brioche, croissants). The principle use of Bakers yeast is as an essential bakery ingredient- for causing fermentation in the dough used in making bakery items. This process helps making soft and fluffy bakery items like variety of breads, bread rolls, pizza base, cracker biscuits, sweet breads and burger buns etc. The useful physiological properties of yeast have led to their use in the field of xylitol biotechnology. Fermentation of sugars by yeast is the oldest and largest application of this technology. The demand of bakers yeast is growing day by day. So there is good scope for new entrants.