The only effective way to treat an allergic and/or intolerance is to eliminate the allergen.

As in celiac disease the only treatment is avoid gluten, and for lactose intolerance is avoid lactose...for fructose malabsortion the only effective treatment would be eliminate fructose from diet.

And take the necessary action to avoid malnutrition or shortages.

I would try the FODMAPS elimination diet that is a relatively new diet plan. This FODMAPS = fermentable oligsachharides, disaccharides, monosaccharides, and polyols which can be found in many foods and are particularly high in honey, apples, lentils, sugar alcohols. So, although you only ask about fructose, this is the latest research about eliminating ALL potential carbohydrate-problem foods and then adding them back one by one to see how the person handles these foods. Much more information can be found online. Hope this helps

Why would you eliminate pulses or beans, cauliflower, mushrooms... in a fructose intolerance?

Fructosin is not for hereditary intolerance (as its website)

I find no point in having fructose intolerance and eat fructose products along with a "kind of fructose blocker".

Is like telling a celiac to eat bread and having 10 pills of activated charcoal...

Or ask a lactose intolerant to drink 2 pints of milk with lactase enzyme...

It could be an option for one day.

Not on a daily basis.

Has the intolerance been perfectly identified?

What are the results?

Is it any issue in GLUT-5?

The point would be avoiding high fructose foods, and train the person to understand and use product labelling and ingredients and food composition.

AND provide the relevant (not multivitamins-minerals) microminerals and or vitamins as a supplement if and when needed.

To my knowledge no validated strategies to diagnose fructose malabporption / intolerance have been identified.

Reports on fructose malaborption/intolerance vary in fructose dose used to detect elevation of exhaled H2 ppm production from 12-40 g, . Most used is a 25 g dose leading to a high sensitivity but poor specificity.

Analysis of median fructose content of the diet of the patient (by a dietician), with which complaints are being associated, may provide the correct testing dose to diagnose a clinically defined fructose malaborption/intolence, if necessary in double blind setting with another monosaccharide testing dose.

Here is an overview:

Dietary fructose intolerance, or fructose malabsorption, is a common condition with a prevalence of 50% in healthy adults; it is distinguished from hereditary fructose intolerance, a rare genetic disorder caused by the lack of a liver enzyme that converts the storage form of glucose (glycogen) into glucose. Nutrition therapy for this condition is a fructose-free diet or a fructose-restricted diet. Fructose malabsorption has only recently been recognized as a clinical problem.

Fructose is a monosaccharide that exists in nature in three forms: free fructose in fruits and honey, as a disaccharide in sucrose, and as fructooligosaccharides (polymers of fructose) in some vegetables and wheat. Fructose is 1.2 times sweeter than sucrose (table sugar) and granulated fructose has been used as a nutritive sweetener by the food industry for more than 20 years. Only recently have fructooligosaccharides been added to commercial food products. The primary source of fructooligosaccharides is chicory root (inulin) added to yogurt and marketed as a probiotic. Fructose accounts for 10% of total energy from sweetened beverages, baked products, and fruit juice. The most common source of fructose in processed food is high-fructose corn syrup (HFCS) made from corn starch by an enzymatic chemical process. The U.S. Food and Drug Administration requires that HFCS be either HFCS-42 or HFCS-55, wherein the number indicates the percentage of fructose; thus, HFCS-42 contains 42% fructose and 53% glucose and HFCS-55 contains 55% fructose and 42% glucose. Food products made with equal amounts of glucose and fructose or more glucose than fructose, as with HFCS-42, are usually well absorbed and tolerated, since glucose promotes intestinal absorption of fructose by solvent drag and passive diffusion. However, food labels do not specify the amount or percentage of HFCS.

Reference:

Academy of Nutrition and Dietetics (2012). Retrieved from http://www.nutritioncaremanual.org/content.cfm?ncm_content_id=90497&highlight=fructose%20malabsorption

Thank you for your contributions. As already hinted at in the introduction, and explained by Yago, Stacey and Diana, dietary restrictions are of course the remedy of choice at the moment. There has been good recent work on this topic, as seen in the attached link, or described by Stacey. For example, the ratio of glucose to fructose, the effect of fructans etc. must be considered.

After an elimination of critical food from the diet, a slow addition of some of the less problematical kinds of nourishment is often possible (i.e. good glucose/fructose ratings). Beans, to answer Yago's question why they should be avoided, apart from the green beans -are- problematical due to their high levels of fructans and galactans, some of them are even unadvisable after elimination.

I must strongly disagree to Yago though that options like the "activated charcoal" approach are totally out of the question. This is due to the fact that some people, even after elimination of critical food and after other causes have been ruled out, remain severely restricted in their choice of food due to fructose.

This is especially hard on younger patients, but also adults: Business lunch, a romantic glass of wine, holidays etc. are all problems, as well as the general peer pressure on people constantly complaining about the food offered.

Therefore, I had hoped to shed some light on additional ways to help these people, namely methods like lactase for lactose-intolerant patients (which, if the problem is for example GLUT-5, in my understanding are not possible that easily for fructose).

http://www.askanaturopath.com.au/media/docs/Fructose_malabsorption.pdf

There was a double blind placebo controlled study of xylose isomerase which shows promising results. Reviews of a supplement (Eat it all) that contains this enzyme on Amazon are very positive, many are from fructmals.

Article Oral xylose isomerase decreases breath hydrogen excretion an...