Yes - FM is not a functional disorders since fructose malabsorption is a physical problem in the GLUT transport system. However, FM and other FODMAPs can exacerbate functional GI disorders such as IBS. One of their recent studies suggested that 50% or more of all IBS subtypes have FM. Gibson and Shepherd original work was on FM only then they expanded it to include other short chained carbs in the FODMAP approach for managing functional GI disorders.
Notice that unlike the other papers where for example they specified the amount of fructose load at < 3 gram/serving in this paper they relaxed this statement and simply said "limitation of ..." with no amount specified and no information in the body of the text about limiting sucrose. Even in their orginal paper on FM they said that malabsorption of fructose when consumed as sucrose or equimolar fructose/glucose in large amounts occured in a minority of patients using the breath test. You might also find the reference below of interest on too.
Fortunately, while I am very sensitive to small amounts of excess fructose I have no problems with sucrose
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Re: rice milk
