Is Apple Cider Vinegar A Miracle Cure?
Apple cider vinegar is a natural source for all kinds of health benefits -- here's why it's so good for your body
Vinegar: Medicinal Uses and Antiglycemic Effect (NIH)
"Based on the writings of US medical practitioners dating to the late 18th century, many ailments, from dropsy to poison ivy, croup, and stomachache, were treated with vinegar, and, before the production and marketing of hypoglycemic agents, vinegar 'teas' were commonly consumed by diabetics to help manage their chronic aliment."
How to make vinegar (How Stuff Works)
"If you have read about the creation of wine and beer, you know that yeast will turn sugar into alcohol. To make vinegar, you use a species of bacteria that eats alcohol and turns it into acetic acid."