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The dosage information for IBS that I have been given by doctors and soluble fiber supplement manufacturers, and that I believe works best for preventing IBS symptoms, is as follows:

*For the soluble fiber powders (Heather's Tummy Fiber™ Organic Acacia Senegal, Citrucel, Benefiber)
Start at 1/2 - 1 level teaspoon twice a day and over the next week or two (or three or four) work up to 2-4 tablespoons twice a day, or the equivalent of 12-25 grams of soluble fiber supplement per day. Some people may need less than this (typically for diarrhea) and some folks may need up to 30 grams per day (typically for chronic constipation). Just keep gradually increasing your dose until you stabilize, and then stay there. Please note that different manufacturers may have different maximum dosages on their labels. Check with the individual manufacturer if you are exceeding the dosage they recommend.

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