Silicon Dioxide
It sounds like something from a lab, and it keeps powders from clumping. What silicon dioxide is, why it’s in supplements and spices, and what regulators have concluded.
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Silicon Dioxide
- Silicon dioxide is silica, the same compound as sand and quartz. It is a flow agent that keeps powders from clumping.
- In the US it is capped at 2% of a food by weight when used this way, and in supplements the real amount is usually far smaller.
- EFSA’s 2024 review found no safety concern at current use levels, but still could not set a numerical daily limit.
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