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Usages
Effect of Glucomannan on Hypertension
There are a number of ways that fiber such as glucomannan may help lower blood pressure, and the exact actions are not yet clear.
Read more about Hypertension and Glucomannan.
Therapeutic Uses
Several small controlled studies have found glucomannan to be effective for improving the cholesterol profile. 1 Glucomannan appears to reduce LDL ("bad") cholesterol and, according to some studies, increase HDL ("good") cholesterol. In addition, it may improve blood pressure .
By expanding in the stomach, glucomannan might be useful for people trying to lose weight. Many people report a feeling of fullness after taking glucomannan, and some studies found a significant weight loss among those taking glucomannan compared to those on placebo . 2 3 4 5 However, not all studies of glucomannan for weight loss have had positive results. 6 Glucomannan may also help the body to regulate blood sugar levels, and therefore could be helpful in treating diabetes . 7 Additionally, glucomannan might be helpful for individuals who experience episodes of low blood sugar following stomach surgery. 8 Like other dietary fibers, glucomannan may help treat constipation . 9
Hyperthyroidism is a state in which levels of thyroid hormone are too high. A preliminary trial found some evidence that when glucomannan is added to standard treatment, normal thyroid hormone levels are restored more rapidly. 10
References
- Venter CS, Kruger HS, Vorster HH, et al. The effects of dietary fiber component konjac-glucomannan on serum cholesterol levels of hypercholesterolemic subjects. Hum Nutr Food Sci Nutr. 1987;41F:55-61.
- Reffo GC. Glucomannan in hypertensive outpatients: pilot clinical trial. Curr Ther Res. 1988;44:22-27.
- Reffo GC, Ghirardi PE, Forattani C. Double-blind evaluation of glucomannan versus placebo in postinfarcted patients after cardiac rehabilitation. Curr Res Ther. 1990;47:753-758.
- Doi K. Effect of konjac fibre (glucomannan) on glucose and lipids. Eur J Clin Nutr. 49 Suppl 3():S190-7.
- Walsh DE, Yaghoubian V, Behforooz A. Effect of glucomannan on obese patients: a clinical study. Int J Obes. 8(4):289-93.
- Vido L, Facchin P, Antonello I, Gobber D, Rigon F. Childhood obesity treatment: double blinded trial on dietary fibres (glucomannan) versus placebo. Padiatr Padol. 28(5):133-6.
- Doi K. Effect of konjac fibre (glucomannan) on glucose and lipids. Eur J Clin Nutr. 49 Suppl 3():S190-7.
- Hopman WP, Houben PG, Speth PA, Lamers CB. Glucomannan prevents postprandial hypoglycaemia in patients with previous gastric surgery. Gut. 29(7):930-4.
- Signorelli P, Croce P, Dede A. Clinical study on the use of a glucomannan and lactulose association in pregnancy constipation [in Italian; English abstract]. Minerva Ginecol. 1996;48:577-582.
- Azezli AD, Bayraktaroglu T, Orhan Y. The use of konjac glucomannan to lower serum thyroid hormones in hyperthyroidism. J Am Coll Nutr. 26(6):663-8.
