Fructo-oligosaccharides
supplement · base score 1 · also listed as source of fructo-oligosaccharides, fos, fructooligosaccharides, prebiotic fructo-oligosaccharide, fructose oligosaccharides, fructo oligo accharides, fructo oligosaccharides, oligofructose, dry oligofructose, fructo-oligosaccharides, fructooligosaccharide, pre-biotic fructooligosaccharide, prebiotic fructooligosaccharide
What is it?
We haven't written a full explanation for this one yet. It's in the supplement category and currently graded good.
At a glance
- Category
- supplement
- Grade
- good
- Base score
- 1 (from −1 to 1; higher is better)
- Found in
- 694 products
- Also listed as
- source of fructo-oligosaccharides, fos, fructooligosaccharides, prebiotic fructo-oligosaccharide, fructose oligosaccharides, fructo oligo accharides, fructo oligosaccharides, oligofructose, dry oligofructose, fructo-oligosaccharides, fructooligosaccharide, pre-biotic fructooligosaccharide, prebiotic fructooligosaccharide
Common questions about fructo-oligosaccharides
Is Fructo-oligosaccharides good for dogs?
Yes, we grade it as a good ingredient: recognisable and nutritionally useful, so it lifts a product’s score. Bear in mind that no single ingredient decides quality; the whole recipe and its balance matter more.
How many UK dog foods contain fructo-oligosaccharides?
694 UK products list fructo-oligosaccharides as an ingredient in our database. The full list is shown below, sorted by rating.
What else is fructo-oligosaccharides called on labels?
Manufacturers list it under several names: source of fructo-oligosaccharides, fos, fructooligosaccharides, prebiotic fructo-oligosaccharide, fructose oligosaccharides, fructo oligo accharides, fructo oligosaccharides, oligofructose, dry oligofructose, fructo-oligosaccharides, fructooligosaccharide, pre-biotic fructooligosaccharide, prebiotic fructooligosaccharide. We match all of these to the same glossary entry when we read a label.
How does Open Dog Food grade fructo-oligosaccharides?
We grade it good, our highest grade, reserved for recognisable ingredients that add real nutritional value. Every ingredient is converted to its dry-matter share and scored from our glossary before a recipe gets its 1-100 rating; the full method is on our methodology page.
What are fructo-oligosaccharides in dog food?
Fructo-oligosaccharides, often labelled as FOS, are short chains of fructose sugars that act as a soluble fibre and prebiotic in pet foods. Manufacturers include them as a food source for beneficial gut bacteria. Most dogs tolerate them well, but some may experience loose stools if introduced too quickly, so speak to your vet if you have concerns.
Can fructo-oligosaccharides help my dog's digestion?
They may help maintain a balanced gut environment by feeding beneficial bacteria. They are not a treatment for digestive problems, so any ongoing issues should be discussed with your vet.









