Ingredient

Fructo-oligosaccharides

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Source
Not animal-derived
Allergen
No
Role in food
FOS are used as a low-calorie sweetener and a prebiotic fiber. They add a …

What it is

Fructo-oligosaccharides (FOS) are short chains of sugar molecules. They are naturally found in foods like bananas, onions, and garlic. FOS are often produced commercially by breaking down inulin, a fiber found in chicory root.

Why it's used

FOS are used as a low-calorie sweetener and a prebiotic fiber. They add a mild sweetness to foods and can help promote the growth of beneficial bacteria in the gut. FOS are commonly found in dairy products, baked goods, and beverages.

Health notes

In the U.S., FOS are generally recognized as safe (GRAS) by the FDA for use as a food ingredient. They are considered a prebiotic fiber, which may support digestive health. International bodies like JECFA and EFSA have evaluated FOS. Some people may experience gas or bloating when consuming large amounts of FOS.

Allergen info

FOS are not derived from any of the nine FDA major allergens. They do not contain gluten.

Products containing Fructo-oligosaccharides

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.