High Spirits Grain Vodka Turbo Yeast is specially formulated for the production of ultra clean vodka using a grain wash. The yeast strain selected is ideal for fermentation of grains, and the nutrient mix is adjusted to provide the nutrients, minerals, and vitamins lacking in a high-gravity grain wash. This ensures a strong, complete fermentation with minimum byproduct production that contribute to off-flavors. Gluco-amylase enzyme breaks down carbohydrates into fermentable sugars, getting the most alcohol from your grain. Specially formulated for grain fermentation to 14%. High Spirits brand Grain Vodka Turbo Yeast with Gluco-Amylase Enzyme is produced in the USA. All High Spirits yeasts are Urea Free!