“Konjac root is another name for glucomannan, the fiber derived from the root of the konjac plant that grows primarily in Asia. According to the Drugs.com site, konjac root has been used in a variety of forms as a treatment for a number of medical problems, including as a method for stimulating and maintaining weight loss. After consumption, the root displays properties within the digestive system that, proponents of glucomannan use claim, can inexpensively control hunger and decrease caloric intake. However, glucomannan use is associated with several potentially serious side effects, and its use has been banned in several countries.
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Konjac root -- also known as konjac fiber and konjac mannon, as well as glucomannan -- is derived from the Amorphophallus konjac plant roots and consists of polysaccharide chains that cannot be absorbed by the digestive system. Konjac root is marketed in four main forms: as a dietary supplement, in meal-replacement drinks, in noodles--often called konjac, shiritaki or yam noodles--and in a dried flake form, designed to be sprinkled on food.”
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