Sorbitol and fructose malabsorption linked to gut symptoms
What it found
Sorbitol and fructose are not fully absorbed in the normal small intestine, and this poor absorption is sometimes linked to stomach complaints and diarrhea.
Challenge studies suggest these sugars may trigger symptoms that look like irritable bowel syndrome.
What they found
Studies in people
Incomplete absorption
Sorbitol and fructose are not completely absorbed in the normal small intestine. This poor absorption is sometimes linked to stomach complaints and diarrhea.
Symptoms like IBS
The symptoms from malabsorbed sugars are indistinguishable from those of functional bowel disease. This means they can look just like irritable bowel syndrome.
Fructans also implicated
Polymerized forms of fructose, called fructans, have also been linked to symptom production in patients with irritable bowel syndrome.
Dietary triggers
Evidence from challenge studies suggests that malabsorbed sugars (fructose, sorbitol, lactose) and fructans may act as dietary triggers for clinical symptoms suggestive of IBS.
What the authors conclude
“Further placebo-controlled studies are needed to obtain definite conclusions about the role of dietary sugar malabsorption in functional bowel disease.”
Also in their conclusions
- They say that further placebo-controlled studies are needed to obtain definite conclusions about the role of dietary sugar malabsorption in functional bowel disease.
How it was done
The authors wanted to understand whether poorly absorbed sugars like sorbitol and fructose, along with fructans, could be dietary triggers for symptoms that look like irritable bowel syndrome.
They looked at evidence from uncontrolled and controlled challenge studies on malabsorbed sugars (fructose, sorbitol, lactose) and fructans in people with symptoms suggestive of IBS.
What it can’t tell you
- We summarised it from the abstract only.
- The evidence comes from uncontrolled and controlled challenge studies, which can suggest a link but cannot prove that these sugars cause IBS symptoms.
- The authors say more placebo-controlled studies are needed before definite conclusions can be drawn.
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 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error