Last reviewed May 2026 · 1 min read
Is Silicon Dioxide vegan?
Also known as: Silica, E551, Sand
E-number: E551
Vegan
Suitable for a vegan diet.
Yes — Mined from quartz or produced synthetically from sand.
01 · The basics
What is Silicon Dioxide?
A naturally occurring mineral used as an anti-caking agent to keep powders free-flowing.
02 · The source
Where it comes from
Mined from quartz or produced synthetically from sand. 100% vegan.
03 · Alternatives
Best vegan alternatives
Rice flour
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Frequently asked
FAQ
Is silica (E551) vegan?
Yes, it is a mineral product.
Commonly found in
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Chitosan
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