Irritable Bowel Syndrome Message Boards | Re: fructose malabsorption and sweet potatoes

There is more fructose in ripe grapes (and more fructose than glucose) than in unripe ones.
http://www.extension.iastate.edu/NR/rdonlyres/A647BBD4-08D5-494B-A55B-680667E6C342/56373/compositionofgrapes.pdf

Fructose content (and fructose:glucose ratio) increases with tomatoes ripening:
http://onlinelibrary.wiley.com/doi/10.1002/jsfa.2740260808/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+4+June+from+10-12+BST+for+monthly+maintenance

But fructose/glucose ratio may not necessary increase with ripening of other fruits.

I haven't found any reliable source that would mention sweet potatoes as high in fructans.

Sweet potatoes contain both soluble and insoluble fiber.
http://huhs.harvard.edu/assets/File/OurServices/Service_Nutrition_Fiber.pdf

In cooked and cooled potatoes some starch is converted into resistant starch that may not be digested in the small intestine so it reaches the large intestine, where bacteria break it down and produce gases that may cause bloating and substances that may trigger diarrhea.

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I don't have IBS.

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