Fructooligosaccharide effects on blood cholesterol levels in people and animals
What it found
Fructooligosaccharides lowered cholesterol in some animal studies and helped people who also changed their lifestyle.
Results in people taking the supplement alone were mixed.
What they found
Studies in people
Cholesterol in people
Taking 2g daily raised good cholesterol but did not clearly lower total cholesterol or triglycerides. A higher dose of 10.6g daily did not significantly lower cholesterol in people with mildly high levels.
FOS with lifestyle changes
People who took the supplement while also exercising and eating a balanced diet saw bigger drops in bad cholesterol. They also had less fat build-up in the liver compared to those who only changed their habits.
Different types matter
Long-chain forms like inulin often reduced blood fats in human studies. Short-chain forms generally did not improve fat metabolism in people.
Animal and lab studies
Cholesterol in rats
In insulin-resistant rats, a diet with short-chain fructooligosaccharides prevented some fat disorders and lowered a fat-making enzyme in the liver. Other rat studies showed lower total cholesterol and less belly fat.
Cholesterol in dogs
Beagle dogs on a calorie-restricted diet enriched with short-chain fructooligosaccharides lost weight. Their total cholesterol also dropped.
Other findings
How FOS is digested
These sugars pass through the stomach and small intestine without being broken down. Gut bacteria ferment them fully in the large intestine, producing gases and short-chain fatty acids.
What the authors conclude
- They suggest that taking fructooligosaccharides may help manage blood cholesterol when combined with lifestyle changes.
- They propose that adding these sugars to the diet could be a useful strategy for lowering cholesterol.
How it was done
The authors wanted to gather current scientific knowledge on how fructooligosaccharides affect blood cholesterol. Human data on this topic had been conflicting.
They searched a medical database for articles published between 1987 and 2014. They found 493 results and selected 34 articles to review. The chosen texts covered how the body processes these sugars and their effects on cholesterol.
What it can’t tell you
- This work gathers past studies rather than running a new trial, so it cannot prove cause and effect on its own.
- Results from rats and dogs cannot show exactly what happens in people taking these sugars.
- Human studies gave different results, so scientists do not yet know which type or dose works best for everyone.
Who paid
- Authors work at
- Federal University of Ceara, Brazil; Faculty of Medicine, Brazil
The paper
- Title
- Fructo-oligosaccharide effects on serum cholesterol levels. An overview
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Costa GT, Abreu GC, Guimarães AB, Vasconcelos PR, Guimarães SB (2015). Fructo-oligosaccharide effects on serum cholesterol levels. An overview. Acta cirurgica brasileira. doi:10.1590/S0102-865020150050000009Free full textPubMed 26016937DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error