this post was submitted on 23 Mar 2026
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More like "the chalk the calcium carbonate comes from is contaminated with lead," interpreting your claim as charitably as possible. Calcium carbonate is the specific chemical compound CaCO~3~; if Pb is present it's a different compound entirely.
Moreover, I highly doubt that every possible commercial source of chalk is contaminated with lead, so unless you can tell which specific product this is just from the picture and know that it's been tested by that site, you can't make that claim in the absolute language you used.
And even then, that's assuming the site itself is credible.
Yeah that's pretty much exactly what I'm saying. I just didn't really feel like typing it all out. Yes the claim there is effectively all chalk is contaminated with lead based on all of the different XRF results she's done on toothpaste.
Kind of like how basically all cocoa beans are contaminated with lead and cadmium as shown by consumer reports. The beans themselves do not contain lead, but the countries that harvest the beans just throw them on the ground and the ground is contaminated with lead and the dust gets on the beans and makes its way into our dark chocolate.