of active dry yeast
Active dry yeast is a rich source of B vitamins (particularly thiamine, riboflavin, and niacin) and minerals such as selenium and chromium. It also contains amino acids and protein, though yeast is typically consumed in small quantities that do not contribute significantly to daily nutritional intake.
About
Active dry yeast is a strain of *Saccharomyces cerevisiae*, a unicellular fungus that has been dehydrated and granulated for culinary use. The yeast cells are living organisms that have been dried to remove approximately 92% of their moisture content, thereby extending shelf life while preserving fermentative capacity. Active dry yeast granules are roughly 0.5-1.0 mm in diameter and typically contain a mixture of living yeast cells and inert materials such as spent yeast and emulsifiers. Unlike instant yeast (also called bread machine yeast), which consists of smaller particles and requires no rehydration, active dry yeast must be dissolved in warm liquid before use to activate the dormant cells and ensure even distribution throughout dough.
Culinary Uses
Active dry yeast is the primary leavening agent in bread-making, pizza dough, and many fermented pastries, where it produces carbon dioxide gas that creates rise and a characteristic open crumb structure. The yeast also develops flavor compounds through fermentation, contributing complex notes to breads, particularly during extended bulk fermentation. Beyond breads, active dry yeast is employed in the production of beer, wine, and other fermented beverages, as well as in some sweet applications such as cinnamon rolls and brioche. Standard practice involves blooming the yeast in warm water (105–110°F / 40–43°C) for 5–10 minutes before mixing into dough, which rehydrates the cells and confirms viability through visible foaming.