Red wine vinegar is a type of vinegar made from fermented red wine. The fermentation process involves converting the alcohol in the wine into acetic acid, which gives vinegar its sour taste. It is commonly used in salad dressings, marinades, and sauces, adding a tangy flavor to various dishes. This vinegar is rich in antioxidants and may offer some health benefits, such as aiding digestion and supporting heart health. It can also be used for pickling vegetables and enhancing the flavor of cooked foods. Overall, red wine vinegar is a versatile ingredient in many kitchens.