Fructooligosaccharide

Fructooligosaccharides (FOS) are a type of carbohydrate that occurs naturally in foods like bananas, onions, and garlic. Industrially, they are typically produced by using enzymes to link together sugar molecules from sources such as corn or sugar beets.

FOS is used as a sweetener and a prebiotic fiber. It adds a mild sweetness to foods and is often added to products like snack bars, baked goods, and dairy items to increase their fiber content and support gut health.

FOS is generally recognized as safe (GRAS) by the FDA for use in foods. It is considered a prebiotic, meaning it can feed beneficial bacteria in the gut. While generally well-tolerated, consuming large amounts may cause gas or bloating in some individuals. JECFA and EFSA have evaluated FOS, and it is permitted for use in many countries.