Difference Between Cider Vinegar & Distilled Vinegar

To make vinegar, the starting ingredient is diluted and a bacteria called Acetobacter aceti is added to cause the fermentation process that turns it into vinegar. Distilled vinegar is often made by fermenting grain alcohol or ethyl alcohol, and tends to be very high in acetic acid, while apple cider vinegar is made by fermenting apple cider, as the name suggests. Apple cider vinegar contains citric acid, formic acid, malic acid, lactic acid and succinic acid as well as acetic acid. Because apple cider vinegar is made with apples, it also contains multiple types of antioxidants called polyphenols which can have beneficial effects on health.

http://www.livestrong.com/article/212202-difference-between-cider-vinegar-distilled-vinegar/