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I Personally eat some, but I try not to over do it. If I do I get d.
Sometimes all this on foods can cause food phobias. hat's something to be careful about really.
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My website on IBS is www.ibshealth.com
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Is there a document that lists common foods and the fructose to glucose and sucrose ratios?
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Excellent question!
Accurate measures are difficult to find. The Australian group that did the original research on IBS and fructose malabsorption actually had to measure the ratios and amounts of fructans in a variety of fruits and vegetables commonly found in Australia. They published the results in the reference below. Unfortunately, the copyright text is not free available on the Internet yet. You should be able to get a copy from a university library.
Here are a few sources I sometimes used when I don't want to dig out the Australian paper.
The tables and figures in the article linked to in my signature has some reliable values.
The tables and figures in the second reference give below has some reliable values. It also tells how fructose and other know triggers like artificial sweeteners, lactose and a variety of other things belong to a broad class of GI irritants.
The Table of Fruits and Sugars at the bottom of this page can be useful but it is confusing. However, it does give you the number of grams of fructose and glucose per 100 grams in a variety of foods from which you can calculate the ratio. I would be cautious about reading too much into the rest of the information on the website.
Principles of Diet in Fructose Malabsorption on this health website has some fairly reliable ratios and a table of safe, eat in moderation and avoid foods that is fairly good.
Reference
Muir, J. G., Shepherd, S. J., Rosella, O., Rose, R., Barrett, J. S., & Gibson, P. R. (2007). Fructan and Free Fructose Content of Common Australian Vegetables and Fruit . J. Agric. Food Chem., 55(16), 6619-6627
Parrish, C. R. (2007). Malabsorption of Fructose and Other Short-chain Carbohydrates . Practical Gastroenterology
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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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Quote:
Normally a person with or with or IBS can handle more than 25 grams of excess fructose. Usually a 25 gram load of fructose is used to diagnose IBS which is about the amount of excess fructose found in a soft drink sweetened with HFCS. At 50 grams almost everyone exhibits fructose malabsorption. As pointed out previously up to 50% of IBS-C and IBS-D can exhibit fructose malabsorption.
I would like to see simple references for this. It seems like things that cannot be so certain. I have never heard of IBS being diagnosed in this way. Perhaps you meant something else.
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IBS-A for 20 years with terrible bloating and gas. On the diet since April 2004. Remember this from Heather's information pages:
"You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines. Treat insoluble fiber foods with suitable caution, and you'll be able to enjoy a wide variety of them, in very healthy quantities, without problem." Please eat IF foods!
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There was an interesting study published recently that I discussed in this posting. They found that fructose malabsorption occured with about equal amounts (48-55%) in IBS-C & IBS-D and about twice as often compared to IBS-A (24%).
That is weird and unreliable. Why would it matter if you had A since it is both C and D? I can't trust a test like that.
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IBSers with fructose malabsorption probably didn't hang around the board long because the EFI diet wasn't working for them. Image how many more might have stayed if fructose malabsorption in IBSers had be accomodated in the EFI diet
That could be true.
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IBS-A for 20 years with terrible bloating and gas. On the diet since April 2004. Remember this from Heather's information pages:
"You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines. Treat insoluble fiber foods with suitable caution, and you'll be able to enjoy a wide variety of them, in very healthy quantities, without problem." Please eat IF foods!
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Re: LM
#355611 - 02/11/10 07:19 PM
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Thank you Cyndy.
I do not follow a low fructose diet. I avoid fructose in drinks and drink no juice or pop (usually) but I eat all the fruits and veggies I want. I avoid HFCS and fruit juice but it is as much for weight issues as for health. I believe the fiber in fruits and veggies helps metabolize the fructose. That is something learned from weight loss advice not IBS advice.
I have never felt a special issue with fructose. I eat all fruits and veggies but eat only limited amounts of grapes, pears, melons; but large amounts of raisins. I am not gas free now but have been stable in the past. I am bloat and gas free in summer in the garden so my continued issues the rest of the year must have a lot to do with other factors than just food.
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IBS-A for 20 years with terrible bloating and gas. On the diet since April 2004. Remember this from Heather's information pages:
"You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines. Treat insoluble fiber foods with suitable caution, and you'll be able to enjoy a wide variety of them, in very healthy quantities, without problem." Please eat IF foods!
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Geesh! Sorry, I was just wondering the safest way to eat a sweet potato. Where am I supposed to post my questions then? Everyone makes it seem like its a crime to talk about fructose on these boards. I dont get it, Im just trying to figure things out like everyone else. I wasn't telling anyone not to eat fructose so what's the problem really?
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Obvious Typo
#355622 - 02/12/10 04:25 AM
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Syl
Reged: 03/13/05
Posts: 5499
Loc: SK, CANADA
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"Usually a 25 gram load of fructose is used to diagnose IBS which is about the amount of excess fructose found in a soft drink sweetened with HFCS."
Should read
"Usually a 25 gram load of fructose is used to diagnose fructose malabsorption which is about the amount of excess fructose found in a soft drink sweetened with HFCS."
But I guess that was obvious 
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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
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Quote:
That is weird and unreliable. Why would it matter if you had A since it is both C and D? I can't trust a test like that
Oh - I hope you write a letter to the editor of the reputable peer-reviewed GI journal that published the results and tell him you don't trust the results and ask that the results be retracted.  Maybe you are just expressing your disappointed to hear the incidence of fructose malasborption can be so high in the IBS population.  IBS-A is a distinct subtype from IBS-C and IBS-D there is no reason to expect that the mechanism underlying the three different subtypes need to be related. Recently a paper published findings that showed IBS-C can be distinguished by other subtypes including IBS-A using a methane as a potential biomarker. It won't be long before they find unique biomarkers for each FGID subtype. 
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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
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The Role of Food & Dietary Intervention in IBS
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The right place
#355625 - 02/12/10 05:13 AM
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Syl
Reged: 03/13/05
Posts: 5499
Loc: SK, CANADA
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You posted your question in the right place. I won't worry about the side comments by the non-believer cheering section. At least once a year the issue of fructose as an IBS triggers comes up and advocates on both sides restate their cases. Over the past few years the evidence that fructose/fructans can be IBS triggers for some individuals has been growing stronger. And over the years more IBSers on the board reduce their fructose/fructan consumption with positive results.
Your question was an excellent question. Keep them coming!
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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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