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Acid

A general term used to refer to the organic acid content of wine. The organic acids found in wine provide crispness and balance. The most common acids in wine are tartaric, malic, lactic, citric, succinic, and acetic. Tartaric and citric acid are often added to wine (in the US) to adjust acidity. Fumaric acid is sometimes added to wine to suppress malolactic fermentation, which converts malic acid into lactic acid.
 Acid - Wine Glossary


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