Superstart™ is an active dry yeast for use in fuel ethanol and beverage alcohol fermentations. It contains a selected strain of Saccharomyces cerevisiae distillers yeast in a highly concentrated and stable form. Superstart was selected for a rapid fermentation start and strong stress tolerance. Rapid starting helps prevent bacterial contamination and improves alcohol yields. Tolerance to temperature, pH, and osmotic stress also improves alcohol yields by maintaining higher yeast counts and lower glycerol concentrations. Superstart is long-lived and resilient in continuous fermentation conditions. Superstart produces a low level of fermentation byproducts and is suitable for many types of beverage alcohol.