E170 — Calcium carbonate

No concern

E170 (Calcium carbonate) raises no animal-source question. Chalk, used as a white colour, a firming agent and a calcium source.

Why it raises no question

It is mined as mineral rock or precipitated chemically. Neither route involves an animal.

Where you meet it

Bread, plant drinks, supplements, sweets.

What to do in the shop

Nothing special to do for E170 itself. Read the rest of the list: a product is only as clear as its least clear ingredient.

A status here describes the additive in general — a specific product can be different. The same number can be made from plant or animal material depending on the manufacturer, and the label does not say which.

Questions people ask

Is E170 halal?

E170 (Calcium carbonate) raises no animal-source question, so on its own it is not a problem. The rest of the ingredient list still decides the product.

What is E170 made from?

It is mined as mineral rock or precipitated chemically. Neither route involves an animal.

Related additives

E171 — Titanium dioxide · No concern
E172 — Iron oxides and hydroxides · No concern
E163 — Anthocyanins · No concern

See all E-numbers →

Check a product, not just a number

An additive's status describes the additive in general. What matters is the whole ingredient list on the packet in your hand.

This is information, not a fatwa. These statuses combine published scholarly positions with ingredient analysis, and they can be incomplete or out of date. For anything that matters, confirm with the manufacturer and with a qualified authority.