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A blend of diammonium phosphate, magnesium sulfate, yeast hulls and vitamin B complex. Use a 1/2 teaspoon per gallon in wine to stimulate fermentation. Use 1/4 teaspoon per gallon in beer to revive a slow or stuck fermentation. Yeast energizer also works well in meads and honey brews to help create a complete fermentation. Size: 1 oz.