Ingredient · E551

Silicon Dioxide Added As An Anti-caking Agent

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Source
Not animal-derived
Allergen
No
Role in food
Manufacturers add silicon dioxide to powdered or granulated foods to prevent clumping and ensure …

What it is

Silicon dioxide is a naturally occurring compound made of silicon and oxygen. It is found in sand and quartz. For food use, it is typically manufactured synthetically.

Why it's used

Manufacturers add silicon dioxide to powdered or granulated foods to prevent clumping and ensure a free-flowing texture. It acts as an anti-caking agent. It is commonly found in spice mixes, powdered sugar, and dried drink mixes.

Health notes

Silicon dioxide is generally recognized as safe (GRAS) by the FDA for use as an anti-caking agent. International bodies like JECFA have also evaluated it. At the low levels used in food, it is not expected to cause health issues. There are no widespread controversies regarding its use.

Allergen info

Silicon dioxide is not derived from any of the 9 FDA major allergens. It does not contain gluten.

Products containing Silicon Dioxide Added As An Anti-caking Agent

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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.