Glucomannanis a plant-basedfiber that is often taken for weight loss. It forms a type of gel in the stomach when consumed, which increasing digestion time and keeping you fuller for longer between meals.
Glucomannanis extracted from Konjac root, a medicinal plant known scientifically as Amorphophallus konjac.It can also be taken tohelpcombat constipation, as it softens the stool and moisturizes it tofacilitate bowel movements.
Glucomannan can be purchasedat pharmacies and health food stores, in the form of supplements in capsules, tablets or powder. Additionally, glucomannan is also used to make flours and pastas, such as shirataki noodles.
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Health benefits
Glucomannan is rich in fiber that can provideseveral health benefits:
1. Promotingweight loss
Glucomannan is rich in soluble fibers that form a type of gel in the stomach. This increases the time it takes forfood to digest, which can helpto control appetite and reduce the amount of food consumed.
2. Regulatingcholesterol and triglyceride levels
Glucomannan helps regulate LDL cholesterol and triglycerides in the blood, as it decreases the absorption of fat from food. It canhelpto prevent diseases such as atherosclerosis, high blood pressure and heart attack.
3. Fighting constipation
Because it is high in fiber, glucomannan helps combat constipation. It increases bulk and water in the stool, to make bowel movements easier.
4. Preventingdiabetes
The fiber present in glucomannan helps to decrease the speed of sugar absorption from food in the intestines. This can help to control blood sugar levels,making it an excellent option for people who have pre-diabetes.
5. Preventingcancer
Glucomannan reduces the risk for colorectal cancer, as it contains soluble fibers that act as a prebiotic. It canfavorthe growth of good bacteria in the intestines tomaintainthe intestinal flora healthy and protectthe intestine.
6. Improving inflammatory bowel diseases
Glucomannan can also help to treat inflammatory bowel diseases, such as ulcerative colitis and Crohn's disease. It helps eliminate harumful bacteria in the intestine, which can reduce swelling and boost immunity.
How to take
Glucomannan should be taken about 30 to60 minutes before the main meals. You can takebetween 500 mg to 4 g of this supplement per day, which should be divided into two doses and always taken with 2 glasses of water.
The use of glucomannan should be done for up to 4 months and only under the direction of a doctor or registered dietitian.
Possible side effects
Takingglucomannan may cause some mild side effects, such as bloating, gas, loose stools, or diarrhea, but these negative effects are uncommon.
When taking glucomannan with little water, the stools can become very dry and hard, causing severe constipation, or even intestinal obstruction, a serious situation that requires immediate medical attention.
Additionally, if glucomannan expands before reaching the stomach, it can cause choking or a blocked throat. Therefore, glucomannan should always be taken with 2 glasses of water.
Contraindications for use
Glucomannan is not recommended for children, pregnant women or breastfeeding women. This supplement is contraindicated for people with a history or activeblockage in the esophagus or stomach, or for those with diseases that cause difficulty swallowing, such as Parkinson's disease, stroke and multiple sclerosis.
People who use hypoglycemic drugs, insulin or any other medication should always consult a doctor before using glucomannan, as this supplement can alter the effect of some medications.
Clinical review:
Karla Leal
Registered Dietitian
Graduated from Grand Rio University with a degree in Nutrition. Licensed to practiced under license # 10100509.
Update History
We regularly update our content with the latest scientific information to maintain an exceptional level of quality.
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21 December, 2023 (Current version)
Updated by Daisy Oliveira - Registered Nurse
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2 November, 2023
Updated by Daisy Oliveira - Registered Nurse
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27 October, 2023
Clinical review by Karla Leal - Registered Dietitian
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Published in October, 2023
References
- REIS, Bruna et al. A influência do glucomanano no controlo de peso. Acta Portuguesa de Nutrição. 46-49, 2021
- FERREIRA Célia. Prebióticos e Probióticos: Atualização e prospecção. 2º. Rio de Janeiro, Brasil: Rubio, 2018. 37-47; 73-90.
- COSTA Eronita. Nutrição & Fitoterapia. 2º. Brasil: Vozes Ltda, 2011. 162-163.
- PINTO João. Nutracêuticos e alimentos funcionais. 1º. Portugal: LIDEL, 2014. 258-259.
- SEIXAS Daniela. Compostos Bioativos dos Alimentos. 1º. São Paulo: VP Editora, 2015. 244-267.
- SUDHANSHU Behera et al. Konjac glucomannan, a promising polysaccharide of Amorphophallus konjac K. Koch in health care. International Journal of Biological Macromolecules. 92. 942-956, 2016
- BARTLOMIEJ M. Zalewski et al. The effect of glucomannan on body weight in overweight or obese children and adults: A systematic review of randomized controlled trials. Nutrition. 31. 437–442, 2015