[1] Products containing glucomannan, under a variety of brand names, are marketed as dietary supplements with claims they can relieve constipation and help lower cholesterol levels.

[7] Other adverse effects include diarrhea, belching, and bloating; in one study people taking glucomannans had higher triglyceride levels.

[citation needed] Glucomannan is also a constituent of bacterial, plant and yeast cell wall with differences in the branches or glycosidic linkages in the linear structure.

Glucomannan is an ingredient in a variety of dietary supplement products marketed with claims that they aid in weight loss, but medical research has found no good evidence to support its use for this purpose.

"[7] Other adverse effects include diarrhea, belching, and bloating; in one study people taking glucomannans had higher triglyceride levels.

The company Obesity Research Institute, the marketer of FiberThin, Zylotrim, Propolene and Lipozene, settled FTC charges that their misleading weight-loss claims violated federal laws by agreeing to pay $1.5 million in consumer redress.

[31] In 2001, a number of jelly-type candy products containing konjac-derived glucomannan were barred from import by the U.S. Food and Drug Administration due to choking hazards.

[32] It is also used as dietary supplement for farmed animals in order to help them gain more weight from food, called the feed conversion ratio.