constipation, or indigestion in healthy adults**. Research on vinegar has focused much more on blood sugar and other metabolic effects than on treating digestive symptoms.
So what can apple cider vinegar actually do—and when might it make digestive symptoms worse?
## What Is Apple Cider Vinegar?
Apple cider vinegar, commonly called ACV, is made by fermenting apple sugars into alcohol and then converting that alcohol into acetic acid.
Acetic acid is responsible for much of vinegar’s characteristic sour taste and many of its biological effects.
Typical apple cider vinegar contains approximately
