Grape vinegar is synonymous with wine vinegar and is made by further fermentation of wine. It's used as a condiment, for pickling and to prepare some sauces. It is also strongly bactericidal and is used in traditional medicine to cure infections. Grape vinegar is low in calories and consumption is associated with a number of health benefits. It is the ideal cooking vinegar to deglaze and prepare sauces for red meat and giblets.
Grape vinegar, like red wine, is rich in polyphenols. These substances are powerful antioxidants that can help to protect you against damage by free radical molecules. Free radicals have been implicated in a number of chronic conditions including cardiovascular disease, cancer, and inflammatory conditions. The darker the vinegar, the higher is the antioxidant content.