Last reviewed May 2026 · 1 min read
Is Silicon Dioxide vegan?
Also known as: Silica, E551
E-number: E551
Vegan
Suitable for a vegan diet.
Yes — Mined from quartz or sand.
01 · The basics
What is Silicon Dioxide?
An anti-caking agent used to keep powders flowing freely.
02 · The source
Where it comes from
Mined from quartz or sand. 100% mineral-based.
Frequently asked
FAQ
Is E551 vegan?
Yes, it is sand/quartz.
Commonly found in
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