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Glucomannan

Medically reviewed by Drugs.com. Last updated on Dec 8, 2021.

What are other common names?

  • Amorphophallus konjac
  • Amorphophallus rivieri
  • Glucomanano
  • Glucomannane
  • Gonyak
  • Konjac
  • Konjac Mannan
  • Konnyaku

What is this product used for?

Glucomannan is used to help with hard stools. It may also help with diabetes or high cholesterol.

What are the precautions when taking this product?

  • Always check with your doctor before you use a natural product. Some products may not mix well with drugs or other natural products.

  • Do not use this product if you are pregnant or plan to become pregnant soon. Use birth control you can trust while taking this product.

  • Do not use this product if you are breastfeeding.

  • Take oral drugs 1 hour before glucomannan or 4 hours after taking glucomannan.

  • This product may interfere with some lab tests. Be sure to talk with your doctor about this and all drugs you are taking.

  • Be sure to tell your doctor that you take this product if you are scheduled for surgery or tests.

  • Take extra care if you are taking drugs that lower your blood sugar. These are drugs like glipizide, acarbose, metformin, or rosiglitazone.

  • If you have blood sugar problems, keep hard candies, glucose tablets, liquid glucose, or juice on hand for low blood sugar.

  • Take extra care and check with your doctor if you have:

    • Liver problems

    • Esophagus, gut, or bowel problems

    • Diabetes

    • Problems swallowing

What should I watch for?

  • Stomach cramps

  • Upset stomach

  • Increased gas

  • Bloating

When do I need to call the doctor?

  • Signs of a very bad reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat. Go to the ER right away.

  • Signs of low blood sugar. These include hunger, dizziness, shaking, a fast heartbeat, confusion, or sweating.

  • Very bad belly pain

  • Very bad loose stools

  • Problems swallowing

Where can I learn more?

Office of Dietary Supplements

https://ods.od.nih.gov/factsheets/WeightLoss-Consumer/

Last Reviewed Date

2021-05-14

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Further information

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