Ingredient

Galacto-oligosaccharides

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Source
Animal-derived
Allergen
No
Role in food
GOS are added to foods as a prebiotic fiber, meaning they can help feed …

What it is

Galacto-oligosaccharides (GOS) are a type of carbohydrate that occur naturally in small amounts in some foods like beans and milk. They are typically produced commercially by the enzymatic conversion of lactose, a sugar found in milk.

Why it's used

GOS are added to foods as a prebiotic fiber, meaning they can help feed beneficial bacteria in the gut. They are often found in infant formulas, dairy products, and health supplements, where they contribute to digestive health.

Health notes

In the U.S., GOS are generally recognized as safe (GRAS) by the FDA for use in foods. They are considered a dietary fiber and may support gut health by promoting the growth of probiotics. International bodies like JECFA have evaluated GOS, but no specific numeric limits are set. Some individuals may experience gas or bloating when consuming large amounts of GOS.

Allergen info

GOS are derived from lactose, which comes from milk. Therefore, they are considered a dairy derivative and are not a major allergen on their own, but individuals with milk allergies should exercise caution.

Products containing Galacto-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.