Fructose and sorbitol absorption in the gut and bowel symptoms
What it found
When fructose or sorbitol are not fully taken in by the gut, they can trigger stomach pain and loose stools.
These symptoms look the same as those of irritable bowel syndrome.
What they found
Studies in people
Incomplete gut absorption
The normal small intestine does not fully take in fructose or sorbitol from food.
Stomach pain and diarrhea
When these sugars are poorly absorbed, people sometimes get stomach complaints and loose stools. These problems look just like functional bowel disease.
Fructans and bowel symptoms
Chains of fructose molecules, called fructans, have also been linked to symptoms in people with irritable bowel syndrome.
Sugars as symptom triggers
Challenge studies suggest that poorly absorbed sugars and fructans may set off symptoms that point to irritable bowel syndrome.
What the authors conclude
- They say more studies using placebos are needed before firm conclusions can be drawn.
- Their view is that scientists do not yet know exactly how sugar malabsorption fits into functional bowel disease.
How it was done
Sugars like fructose and sorbitol are common in food but are not always fully taken up by the small intestine. The authors wanted to see if this poor uptake could explain stomach problems that look like irritable bowel syndrome.
They looked at past challenge studies where people were given sugars or fructans to drink. Some of these studies used a placebo for comparison, while others did not.
What it can’t tell you
- We summarised it from the abstract only.
- Some of the challenge studies had no placebo group, so it is hard to separate real effects from expectations.
- These studies show a link between poorly absorbed sugars and symptoms, but cannot prove the sugars cause the bowel disease.
Who paid
- Authors work at
- Hospital Universitari Mutua Terrassa, Spain
The paper
- Title
- Fructose-sorbitol malabsorption
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people
- Summarised from
- Abstract only
- Cite
- Fernández-Bañares F, Esteve M, Viver JM (2009). Fructose-sorbitol malabsorption. Current gastroenterology reports. doi:10.1007/s11894-009-0056-9PubMed 19765364DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error