Last reviewed May 2026 · 1 min read
Is Ammonium Alginate vegan?
Also known as: E403
E-number: E403
Vegan
Suitable for a vegan diet.
Yes — Extracted from brown seaweed.
01 · The basics
What is Ammonium Alginate?
An ammonium salt of alginic acid used as a thickening agent.
02 · The source
Where it comes from
Extracted from brown seaweed. It is 100% plant-based.
Frequently asked
FAQ
Is E403 vegan?
Yes, it is seaweed-derived.
Commonly found in
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