Prune Juice: A Helpful Aid To Physical Well-Being
Most of us who have investigated treatments for constipation will have come across the prune. These dried fruits are regarded as generally beneficial for relieving constipation, largely due to the large amount of fiber. But what many don’t know about is that the juice from prunes is also an excellent type of treatment.
The prune is simply a dried plum known by the scientific name of Prunus domestica. Archaeological evidence suggests that man has been cultivating plums and drying them for hundreds if not thousands of years. The method of processing is quite simple: 18 hours of hot air dehydration, typically at 90 degrees Celsius. After dehydration, the material can be further processed into other products like prune juice.
The conventional understanding is that prunes get their laxative effects by having a lot of fiber. In fact, the fiber is over 5% by weight, which is quite high for a fruit. Prune juice however has almost no fiber because the particulates are filtered out usually. Therefore, how does prune juice benefit those who suffer from constipation? The key is sorbitol, a long complex sugar.
Prune juice has very high levels of this mysterious sugar substitute called sorbitol. Unlike glucose, sorbitol is a long polysaccharide chain that is no easy to digest by the human stomach. As such, it resides in the intestinal space and absorbs a lot of water. Sorbitol’s non-digestible property means that it’s also often used as a sugar substitute in foods.
Pears and sugar free gum are two other things with sorbitol. Of course, the pear has a higher amount and is presumably a good aid for digestion as well. One interesting fact is that dietary fiber has molecular properties that are very similar to sugar and sorbitol. It’s no coincidence that all of these laxatives have similar molecular characteristics.
How does sorbitol achieve its anti-constipatory effects? There are two properties, both of which have already been mentioned. The first is that sorbitol tends to absorb a lot of water, the second is that sorbitol isn’t metabolized by the body. Together, the effect of sorbitol is to bulk up the colonic mass with a lot of fluids.
With excess water, the colon contents become less dense and pass more easily through the body. The class of laxatives that exerts its effects through water retention is known as the osmotic laxatives. Prune juice is convenient to store and take all day. However, as with any type of self-administered laxative treatment, it’s probably best to ask a physician for safety and dosing instructions.
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