Last reviewed May 2026 · 1 min read
Is Calcium Carbonate vegan?
Also known as: Chalk, E170
E-number: E170
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Source can be plant or animal.
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It depends — It can be mined from limestone (vegan) or derived from crushed oyster shells (non-vegan).
01 · The basics
What is Calcium Carbonate?
A white mineral salt used as a coloring agent and calcium supplement.
02 · The source
Where it comes from
It can be mined from limestone (vegan) or derived from crushed oyster shells (non-vegan). Verification is required.
03 · Alternatives
Best vegan alternatives
Mined Calcium Carbonate
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Frequently asked
FAQ
Is the calcium in my bread vegan?
Usually, yes (mined chalk), but some brands use animal-derived calcium from shells. Look for 'Vegan' certification.
Commonly found in
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Other coloring / supplement ingredients
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Related ingredients
E422 (Glycerol / Glycerin)
A sweet, syrupy liquid used as a humectant in foods and cosmetics.
E920 (L-Cysteine)
A dough conditioner used in commercial bread baking.
Calcium Carbonate
A common mineral used as a white food coloring, an anti-caking agent, and a calcium supplement.
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