Citric acid is the primary acid found in lemons, limes, and other "tart" fruits. Added to taste, it will provide the extra bite missing in some wines. Recommended dose is to add to taste beginning with 1/2 tsp. per 5 gallons of wine. Citric Acid can also be used as an excellent sanitizer by making a 3 to 1 blend of citric acid and potassium metabisulfite.