It is my understanding that wheat has fructans in it - so a generous helping of a wheat-based food could cause problems in a person with fructose intolerance/malabsorption.
The overload of lactose, fructose, and fructans altogether can reep major problems for someone with FM.
In theory, as I know, wheat should not affect fructose intolerant people. In fructose intolerance foods with high fructose, high fructose:glucose ratio, sorbitol (diet cola, sugar free chewing gum), and high fructose corn syrup (HFCS), which is added in many foods and drinks, should be avoided.
Generally a GI doctor would order a test for celiacs diesease but you can do the test yourself. If your symptoms go away when you eliminate wheat, barley, rye and malt products from your diet...chances are you have some kind of gluten intollerance.
I have had the blood test as well as a colonosocpy done to test for gluetn intollerance...both came back negative but when I eat anything containing gluten I suffer terribly. There is a high rate of false/negatives associated wtih the test for celaics disease for several reasons.
Doctors really do not know much about gluten intollerance because there is no money to be made from this. The only way to treat someone with celaics disease is a diet change only. Most doctors will diagnose a person as having IBS and prescribe them some kind of anti-spasm med which wont work.
My GI doctor has litterally argured with me in her office telling me there is no way I have celiacs disease. Listen to you body...it knows what it needs.