What other names is Glucomannan known by?
Amorphophallus konjac, Amorphophallus rivieri, Glucomanano, Glucomannane, Konjac, Konjac Mannan.
What is Glucomannan?
Glucomannan is a sugar
made from the root of the konjac plant (Amorphophallus konjac). Glucommanan powder, capsules, and tablets are used as medicine.
Glucomannan is used for constipation
, weight loss
in adults and children, type 2 diabetes
, blood sugar
control, and lowering cholesterol
In foods, glucomannan is used as a thickener or gelling agent. Glucommanan flour and powder are used in food.
Possibly Effective for...
Insufficient Evidence to Rate Effectiveness for...
- Stomach condition called dumping syndrome. Some early research suggests that taking a specific glucomannan product (Propol, Pharmacia, Woerden, The Netherlands) reduces the risk of blood sugar becoming too low after eating in people who have had stomach surgery. However, not all research agrees. Some research suggests that glucomannan does not improve blood sugar absorption in children after stomach surgery.
- High blood pressure. Some early research suggests that glucomannan might improve blood pressure in people with high blood pressure.
- Overactive thyroid (hyperthyroidism). Early research suggests that glucomannan plus methimazole and propranolol reduce thyroid hormone levels in people with too much thyroid hormone in the body.
- Obesity. There is early research that suggests taking glucomannan by mouth might improve weight loss in overweight and obese adults and children. However, not all research agrees.
- Other conditions.
More evidence is needed to rate glucomannan for these uses.
Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.