Drinking vinegar after a meal can aid in digestion, according to WebMD, but the strong acid can harm the esophagus and tooth enamel. For best results, drink only 1 or 2 tablespoons of natural, unfiltered apple cider vinegar diluted in a full glass of water.
Various studies have tested the other possible health benefits of vinegar. Vinegar may help to regulate waking blood sugar for adults with well-managed Type 2 diabetes, explains the American Diabetes Association. Researchers believe the acetic acid inhibits the digestion of starches, but the effect is small. A dose of vinegar may help patients manage their blood sugar, but it does not eliminate the need for a healthy diet or insulin treatments.
WebMD cites a study performed in Japan to test vinegar's effect on weight loss. In the study, 175 obese people were asked to eat similar diets over 12 weeks, while part of the group also took daily doses of vinegar. People in the vinegar group lost a pound or two over three months. Although vinegar may slightly stimulate weight loss, it is not a substitute for a proper diet and exercise. It is unclear how beneficial vinegar may be, but the risks are small. Properly diluted vinegar is safe to consume.