What Is Apple Cider Vinegar?

Apple cider vinegar is mostly apple juice, but adding yeast turns the sugar in the juice into alcohol. This is a process called fermentation. Bacteria turn the alcohol into acetic acid. That’s what gives vinegar its sour taste and strong smell.

Apple cider vinegar has a long history as a home remedy, used to treat things like sore throat and varicose veins. There isn’t much science to support the claims. But in recent years, some researchers have been taking a closer look at apple cider vinegar and its possible benefits.

Some people say the “mother,” the cloud of yeast and bacteria you might see in a bottle of apple cider vinegar, is what makes it healthy. These things are probiotic, meaning they might give your digestive system a boost, but there isn’t enough research to back up the other claims.