Prune juice has a reputation as "nature’s laxative" because it contains sorbitol, a natural sugar that helps constipation. Adding butter and warming it up may also help boost the laxative effects.

Prune juice may be a tried-and-true drink to ease constipation, but it’s not the only juice that can do the trick. And if you’re desperate for relief, you’re far from the only one. Chronic ...