Is Silicon Dioxide in Food Gluten-Free?

Yes, silicon dioxide (also known as silica) used as a food additive is gluten-free.

Why it's safe: Gluten is a protein composite found in wheat, barley, rye, and related grains. Silicon dioxide, by contrast, is a naturally occurring mineral compound of silicon and oxygen. It contains no proteins from gluten-containing grains.

Common uses: It functions as an anti-caking agent, preventing powdered or granulated foods (like spices, baking powder, and coffee creamers) from clumping by absorbing excess moisture.

Safety: Regulatory agencies worldwide, including the FDA and EFSA, consider silicon dioxide safe for consumption at approved levels. It passes through the digestive tract largely unabsorbed.

People with celiac disease or non-celiac gluten sensitivity can safely consume products containing silicon dioxide.