Acids in wine responsible for the sour taste of vinegar. During fermentation, activity by yeast cells naturally produces a small amount of acetic acid. If the wine is exposed to oxygen, "Acetobacter" bacteria will convert the ethanol into acetic acid. This process is known as the “acetification” of wine and is the primary process behind wine degradation into vinegar. An excessive amount of acetic acid is also considered a wine fault. A taster's sensitivity to acetic acid will vary, but most people can detect excessive amounts at around 600 mg/l. Ascorbic acid, also known as vitamin C, is found in young wine grapes
French wine In other words: when the same grape variety is planted in different regions, it can produce wines that are significantly different from each other. In France the concept of "terroir" manifests itself most extremely in the Burgundy region. The amount of influence and the scope that falls under the description of "terroir" has been a controversial topic in the wine industry. The amount of information included on French wine labels varies depending on which region the wine was made in, and what level of classification the wine carries. As a minimum, labels will usually state that classification, as well as