A classic cure for constipation is prune juice. The fruit works as a natural laxative because it has high amounts of fiber, and contains sorbitol. Sorbitol softens stools because it is a natural carbohydrate that is not easily ingested, causing it to draw a lot of water as it passes through the intestines and adding bulk to stool. Be careful though-too much and sorbitol can cause gas and make stool too soft.
Drink one glass of prune juice (8oz) in the morning and one at night to relieve constipation. It should start working within a few hours, so it's important to let one glass pass through your intestines before attempting to drink another or else you risk diarrhea. You can also eat several prunes instead of drinking the juice if you prefer.