Amorphophallus Konjac Diet

The root of Amorphophallus konjac, more commonly known as glucomannan, is a type of water-soluble fiber. Amorphophallus konjac fiber is very effective at absorbing and holding water, which helps add water and bulk to stools, making the fiber beneficial for relieving occasional constipation. Adding Amorphophallus konjac to the diet also may be useful for losing weight. Consult a qualified health care provider before taking Amorphophallus konjac for weight loss.

Benefits

Like other types of fiber, Amorphophallus konjac is not absorbed by the body, but travels through the digestive tract until it is eliminated. Konjac fiber is not only helpful for relieving constipation, it also lowers cholesterol and blood sugar, according to Beth Israel Deaconess Medical Center. Because this fiber slows the transport of food from the stomach into the intestines, it makes people feel full longer, which can decrease appetite.

Effects on Weight

A study published in the March 1992 issue of "Minerva Medica," with lead author P.M. Vita, demonstrated that glucomannan dietary supplements may be effective in the treatment of severe obesity because the supplements keep people feeling satiated. In this study, two groups of 25 very obese participants ate a low-calorie diet for three months either with or without a glucomannan-based supplement. Participants taking glucomannan lost significantly more weight than participants in the control group.

Effects on Cholesterol

Another study found that konjac root fiber not only resulted in a significant average weight loss over eight weeks in obese participants, but that it also was beneficial for decreasing levels of total cholesterol and low-density lipoprotein cholesterol, the so-called bad cholesterol. The participants had been instructed not to change their eating or exercise routines. This research, with lead authors D.E. Walsh and V. Yaghoubian, was published in the "International Journal of Obesity" in 1984.

Usage

Amorphophallus konjac is available in powder form and in capsules, typically labeled with the active ingredient as glucomannan. Some manufacturers promote the product for weight loss. Noodles made with konjac fiber also are available, and they may be labeled as shirataki or yam noodles, according to an article by Laura Johannes in the January 19, 2010 issue of the "Wall Street Journal." You can buy these noodles in Asian grocery stores.

Side Effects

Side effects associated with Amorphophallus konjac are usually minor. Taking too much can cause gas or abdominal pain. The main risk involves not taking the powder with enough liquid, which can cause choking if it becomes stuck in the throat or esophagus. Some countries have actually banned weight-loss products containing glucomannan for this reason, according to physician and medical writer Andrew Weil. Always drink a full glass of water when taking Amorphophallus konjac supplements.