Vitner's Harvest Malic Acid is used to adjust the Malic acid in home brewed wine. Malic acid is very important in wine. If there is not enough, the wine will taste “flat,” and will be more susceptible to spoilage. If there is too much, the wine will taste “green,” or “sour.” It is important for the home brew winemaker to control the amount of Malic acid present.
One of Malic acids defining characteristics is the strength of its taste. Some would describe it as harsh. Add 6grams per 5 litres as required.