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What are some side effects from konjac root fiber?

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Quick Answer

Konjac root fiber contains a high-fiber content, which may cause blockages of the intestine or throat when taken in solid tablets. In people with diabetes, it may also impact blood sugar control, says WebMD. In addition, flatulence and abdominal discomfort are possible side effects, claims University of Michigan Health System.

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Full Answer

Konjac root fiber, derived from the Amorphophallus konjac plant, is the main ingredient in the sugar glucomannan. Made into a powder or a flour, glucomannan is used to gel or thicken foods. As a medicine, it is ingested in the form of a tablet, capsule or powder. It is utilized most commonly to treat constipation, lower cholesterol and blood sugars and as a component in weight loss aids, notes Drugs.com.

In the gastrointestinal system, glucomannan absorbs water and creates a bulky fiber that helps ease constipation. In addition, it may delay the body’s absorption of sugar and cholesterol. Due to this delay, konjac root fiber may decrease the effectiveness of medications taken by mouth at the same time. To prevent this side effect, glucomannan should be taken at least one hour after any oral medications. Another potential side effect is interference with blood sugar control during and after surgery, and it is advised to stop taking it two weeks before undergoing surgery, as advised by WebMD.

Taken as a powder or capsule, it is probably safe for children and adults to use for up to four months, says WebMD. As a soluble fiber, konjac root cannot be absorbed and is not likely to have an effect on lactation or a nursing baby, claims Drugs.com.

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