Silicon Dioxide

Silicon dioxide (sometimes called silica) is commonly used in dietary supplements as an anti-caking or flow agent (which means it prevents ingredients from clumping and sticking together). Silicon dioxide is recognized as safe for consumption (GRAS) by the FDA when it’s used in small amounts in supplements.

What to know: 

• You don’t absorb it. It passes through the digestive system unchanged
• It helps maintain the quality and stability of supplement powders and tablets