Common kitchen staple may help relieve mild constipation, new research suggests

People who suffer from mild constipation may find some relief with a simple daily vinegar drink, new research suggests, even as experts urge more study and share cautions. 

Constipation is a condition in which a person generally has fewer than three bowel movements a week, according to the National Institutes of Health (NIH). Stools may also be hard, dry or lumpy and difficult or painful to pass.

The NIH says adults should get 22 to 34 grams of fiber a day, depending on age and sex ...