Simply put, apple cider vinegar (commonly referred to as ACV) is a fermentation of apple cider, which is simple juice extracted from apples. u003cbr/u003eu003cbr/u003eSince the apple cider goes through a fermentation process, this produces something called the u0022mother”. A combination of yeast and bacteria formed during fermentation. If you look at an unfiltered apple cider vinegar bottle, you can see strands of the u0022motheru0022 floating around.u003cbr/u003eu003cbr/u003eACV is rich in B-vitamins and polyphenols (plant-based antioxidants).u003cbr/u003eThe probiotics, acetic acid, and the nutrients in ACV are responsible for its health benefits. (Source) debunking the health benefits.u003cbr/u003e