Calcium Carbonate in noodles, pasta, bread, etc

[TossaCointoyerWitcha]

No idea why, but was glancing through a few ingredients lists recently and noticed Calcium Carbonate is a major ingredient. I distantly remember my old chemistry teacher telling me it was used as a bulking agent in headache pills and the Victorian Bakers episode where the created "chalk bread" for profiteering purposes but had thought this was outlawed in the UK.

Doing a bit a Googling, however, I found one UK-based mineral supplier does indeed say this about the Calcium Carbonate they supply:

"Calcium carbonates are effective bulking agents as well as thickeners used to increase viscosity in a wide range of applications such as bakery products."

So was I wrong, and making modern "chalk bread" is actually still legal? Or has the law changed since Brexit? And, if so, is it possible food suppliers could be using it to cut costs in these "cost of living crisis" times (I've seen it as a major ingredient of noodles and pasta too)?

It's added to white flour to bring the calcium content up, along with folic acid and iron (maybe other minerals you, but can't remember), all those products contain flour. It's not used as a bulking agent in those cases. It's also added to many plant milks to raise the calcium level to that of cow's milk

It’s also used as an anti caking agent in some dry powdery goods.

Can you link to an example of an ingredient list with Calcium carbonate as a major ingredient?

@Chemenger
I think the problem may be it's listed in brackets after flour in the ingredients, so it appears to be a major ingredient, but it's in brackets as it's an ingredient within flour, so can be a bit confusing.

I’m concerned too, I can’t find any info on the quantity allowed.

It is to fortify flour with calcium. Not only is it perfectly legal, but it is required in certain products.
Calcium propionate on the other hand is something we really shouldn't be eating. I can't eat it, I get awful stomach pains with it.

It's added in small amounts to improve the nutritional content, nothing to be worried about.