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Silicon Dioxide (E551)

Anti-caking Agent
Generally Safe

Synthetic sand used to stop powdered foods from clumping. Passed by the body without absorption.

Details

Found in protein powders, salt, and dry soup mixes. It absorbs tremendous moisture. Although it is mostly safe, inhalation of the powder is dangerous.

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Frequently Asked Questions

Is it literally sand?

It's essentially the same compound as quartz sand, ground microscopically.

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