Irritable Bowel Syndrome Message Boards

It is strange they never tested you at the Mayo Clinic. On this web page on their web site they talk about fructose intolerance. Unfortunately they also have a couple of ambiguities in the notes because sugar (beet or cane) is not a problem fructose malabsorber but is a problem for hereditary fructose intolerance (a rare genetic disorder). It is also listed as one of the tests for chronic constipation on this web page,

My diet is very simple and basic.

Breakfast: oatmeal with 1/4 banana or 1/2 kiwi (deseeded) and brown sugar

Lunch: mildly curried 1/4 chicken breast & 6 shrimp OR 1/2 small grilled chicken breast with carrots & zucchini and 1/2 cup reheat white rice.

Supper: chicken, bison, fish, seafood or pork tenderloin with carrots, zucchini or beets and rice, potatoes or pasta.

I eat gluten containing products. I moderate the amount of wheat products I eat to about the equivalent of 3 slices of bread per day. I don't each onions or Jerusalem artichokes because of their high fructan content. Also, I don't use any supplements or dietary aids especially those containing inulin or FOS (these are fructans that I cannot tolerate even in small amounts).

For the hydrogen breath test for SIBI you likely drank a liquid contain lactulose. For the fructose test you would drink a liquid containing about 25 grams of fructose -- this is equivalent to one soft drink which contains 25-40 grams of fructose from HFCS. The problem with this test is that it only tells you if your fructose malabsorption occurs at the level of a 25 gram fructose load. If you are positive it does not tell you how much fructose you can actually tolerate. This you have to determine by experimenting. Also, the test has a high rate of false negatives. The best test is to remove foods with high excess free fructose for 3-4 weeks and see how it effects you.

I use the article referred to on this web page and the USDA and Fenili databases as my excess fructose food guides.

Good luck

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STABLE: ♂, IBS-D 50+ years - Science of IBS

The FODMAP Approach to Managing IBS Symptoms
Evidence-based Dietary Management of Functional GI Symptoms: The FODMAP Approach
FODMAP Chart & Cheatsheet
The Role of Food & Dietary Intervention in IBS

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