Apple Cider Vinegar is an old fashioned remedy used in cases of indigestion and acidity as it helps to alkalise the body and blood stream by ensuring adequate digestive processes and reducing the formation of acid due to maldigested foods. Apple cider vinegar is also something that has been used to support insulin production in the pancreas and balance blood sugar levels in people who suffer from dysglycemia (specifically hyperglycemia).
It is best to take Apple Cider Vinegar ( no sweetener is necessary) prior to meals (10 minutes) to stimulate the production of digestive enzymes and acids prior to eating and for the production of insulin which pulls sugars into the cells