While there are many varieties of yeast available on the market, our favorite is Instant Rise Yeast. No need to activate, this yeast is ready to go from the moment you open the package. Guaranteed to be 100% active, we also love it for its reliability and consistent results. Readily dissolving into everything from batters to doughs, there's no need to rehydrate as with Active Dry Yeasts. Unmatched in terms of its stability and shelf-life, you'll be hard-pressed to find a leavening agent better than this one! Instant, Active, and Fast-Acting Yeast: What's the Difference? For best results when baking, it pays to understand your ingredients, and one of the trickiest elements in any recipe is the leavening. Dry yeast, is found in two forms: Instant and Active. Active yeasts need to be "activated" before incorporating them into a dough, while instant dry yeast is ready the "instant" it's opened. Finally, fast-acting instant yeast is a sub-category of instant yeast that works more quickly, making it unsuitable for slow-rising, overnight proofing doughs.