Glucomannan Side Effects
As with all supplements and medications, it is possible to develop side effects while taking glucomannan. Side effects of the herbal supplement may include gas, bloating, and diarrhea. If you develop more serious side effects from glucomannan (such as difficulty swallowing, severe diarrhea, or breathing problems), you should contact your healthcare provider right away.
As with any medication or supplement, side effects are possible with glucomannan. In fact, there have been reports of at least one serious side effect of glucomannan.
(This article covers many, but not all, of the possible side effects with glucomannan. Your healthcare provider can discuss a more complete list of glucomannan side effects with you.)
Glucomannan (as well as any other fiber supplement) is most likely to cause side effects of the digestive tract. These common glucomannan side effects may include:
- A feeling of fullness
- Abdominal pain (stomach pain)
As with all fiber supplements, these side effects can probably be avoided by gradually increasing your fiber intake, giving your body a chance to adjust to the fiber.
There are a number of side effects with glucomannan that you should report to your healthcare provider. These include, but are not limited to:
- Difficulty swallowing or a feeling that glucomannan is stuck in your throat
- Very severe diarrhea (or diarrhea that does not go away)
- Changes in your blood sugar (which is important for people with diabetes)
- Breathing problems (from accidentally inhaling glucomannan powder)
- Signs of an allergic reaction, such as a rash, hives, itching, swelling of the mouth or throat, wheezing, or difficulty breathing.