Yeast is a microorganism which is in charge of the last step of fermentation. Yeast breaks
into alcohol and carbon dioxide which is necessary in the process of fermentation.
Yeast enhances metabolism and expands capillary vessels.
Yeast functions to resynthesize organic substances decomposed by various microbes into amino
hormones, vitamins, etc.,
Yeast produces various substances, e.g., vitamins, nucleic acids, minerals, hormones and fatty
that humans cannot synthesize. It is not healthy to eat many fermented foods containing yeast.
Yeast has the excellent ability to decompose chemical fertilizers.
Yeast usually sticks onto the fruit surface. Many yeast exists specifically on the grape.