Irritable bowel syndrome (IBS) is a problem that affects the large intestine. It can cause abdominal cramping, bloating and a change in bowel habits. Some people with the disorder have constipation; others have diarrhea, some go back and forth between the two. Although IBS can cause a great deal of discomfort, it does not harm the intestines. Dietary fiber seems to reduce the abdominal discomfort and allows the colon to relax, resulting in consistent bowel movements on a regular basis. IBS supplements such as Konsyl Original Formula contain 6 grams of psyllium fiber per dose.

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