Give your beer, mead, wine, or yeast culture an energy boost! Use 1/2 teaspoon per 5 gallons of beer. Store at 40-70F. Add to boil in last 5 min., or boil separately for 5 min. Shelf life is nine months from date of preparation on vial. White Labs Nutrient is comprised mostly of amino acids, which are building blocks for proteins. It doesn’t speed up a fermentation much, but it does make for healthier yeast. It can be used with Servomyces.