Last reviewed May 2026 · 1 min read

Is Calcium Guanylate vegan?

Also known as: E629

E-number: E629

Check the Label

Source can be plant or animal.

In short

It depends — Derived from guanylic acid, which can come from plant fermentation (vegan) or fish (non-vegan).

01 · The basics

What is Calcium Guanylate?

A calcium salt of guanylic acid used to enhance savory flavors.

02 · The source

Derived from guanylic acid, which can come from plant fermentation (vegan) or fish (non-vegan).

Frequently asked

Is E629 suitable for vegans?

Only if the manufacturer confirms the guanylic acid was not sourced from fish.

Is it safe?

Yes, it is a safe and approved food additive, though people with gout are sometimes advised to avoid added purines.

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