Ingredient

Yeast

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Source
Not animal-derived
Allergen
No
Role in food
Yeast is primarily used in food for its leavening and fermentation abilities. In baking, …

What it is

Yeast is a single-celled microorganism, a type of fungus, that is naturally found in the environment. For food production, specific strains of yeast, such as Saccharomyces cerevisiae, are cultivated through fermentation processes. These cultivated yeasts are then used in various forms, including active dry yeast or nutritional yeast.

Why it's used

Yeast is primarily used in food for its leavening and fermentation abilities. In baking, it helps bread and other doughs rise by producing carbon dioxide gas. It is also essential for fermenting alcoholic beverages like beer and wine, and certain types are used as a flavor enhancer in savory dishes or as a nutritional supplement.

Health notes

Yeast is generally recognized as safe (GRAS) by the FDA when used in food. It is a common food ingredient and is considered safe for consumption by most people. While JECFA has evaluated certain yeast-derived products, yeast itself is a widely consumed microorganism without specific ADI limits set for its general food use. Some individuals may experience digestive discomfort or allergic reactions to yeast, though this is not common.

Allergen info

Not a major allergen.

Products containing Yeast

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Kashi US Kashi Pizza Mushroom Trio & Spinach 5.35Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 22% DV per serving —kcal 10.7Protein 6Fat 36.5Carbs Kashi US Kashi Pizza Mediterranean 12.7Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 28% DV per serving —kcal 12.7Protein 7.5Fat 31Carbs Kashi US Kashi Entre's India Tikka Masala 5.6Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) —kcal 10.2Protein 5.9Fat 29.5Carbs Kashi US Kashi Pizza Roasted Vegetable Thin Crust 12.2Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 28% DV per serving —kcal 12.5Protein 8.4Fat 24.5Carbs Kashi US Kashi Pizza Mushroom Trio & Spinach 11.9Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 29% DV per serving High in saturated fat — 23% DV per serving —kcal 12.7Protein 8.3Fat 24.6Carbs Kashi US Kashi Pizza Margherita Thin Crust 11.9Oz Vegetable Based Products / Meals - Not Ready to Eat (Frozen) High in sodium — 28% DV per serving High in saturated fat — 20% DV per serving —kcal 12.8Protein 8.4Fat 25.7Carbs Kellogg Company US Sunshine Krispy Saltines .4Oz Biscuits/Cookies (Shelf Stable) 416kcal 10.1Protein 8.5Fat 76.4Carbs Kellogg Company US Sunshine Cheez-It Pepper Jack 12.4Oz Biscuits/Cookies (Shelf Stable) —kcal 9.9Protein 24.6Fat 61.1Carbs Kellogg Company US Pringles Stix Cheese .61oz Chips/Crisps/Snack Mixes - Natural/Extruded (Shelf Stable) —kcal 9.3Protein 18.7Fat 58.6Carbs GENERAL MILLS SALES INC. Prog Panko Crspy Bread Crumbs Lemon Ppr Baking/Cooking Supplies (Shelf Stable) 357kcal 7.1Protein 3.6Fat 71.4Carbs GENERAL MILLS SALES INC. Annies Bkd Snck Crckrs Chdr Squares Biscuits/Cookies (Shelf Stable) 467kcal 10Protein 23.3Fat 60Carbs GENERAL MILLS SALES INC. Bugles/Chex Mix Spicy Snck Mix Chdr Hot Buffalo Chips/Crisps/Snack Mixes - Natural/Extruded (Shelf Stable) 433kcal 6.7Protein 15Fat 73.3Carbs

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.