Apple cider vinegar is a fermented apple cider. The process involves letting crushed apples, yeast, and water sit at room temperature until the yeast turns the sugars from the apples into alcohol.
Apple cider vinegar is an apple juice that has undergone a two-step fermentation process. Basically, yeasts are introduced to the solution, which feeds on the sugars in the apple and produces alcohol.
Once this happens, natural bacteria will turn the alcohol into acetic acid, which is where the pungent odor and taste of apple cider vinegar comes from. You have two options when you buy apple ...