I think my takeaway from the "there's heavy metal in basically all dark chocolate" is less: avoid dark chocolate

and more: we live in an impossibly polluted era, you can't avoid this. SPINACH is a concentrator of heavy metal, they're in the air and soil, this is a growing problem not a processing impurity. So just eat food and accept history will view us as polluted bumpkins like the Romans. https://www.cbsnews.com/news/dark-chocolate-metals-lead-consumer-reports-hersheys-trader-joes-cadmium/

Heavy metals found in dark chocolate including Trader Joe's and Hershey's

Consumer Reports says potentially harmful levels of cadmium and lead were detected in some chocolate brands.

CBS News

I don't even know how you're meant to deal with this as a "savvy shopper". You like testing every single product ever single time for every single pollutant? Because that's what you'd have to do. Pretty much every other remediation tool at your disposal will be insufficient yet more than enough to radically reduce your quality of life.

You want to avoid spinach and root crops? I mean ok. But. Those are in our diet for pretty good Actually Verified medical reasons. Sooo. Yeah. We're just fucked.

@glassbottommeg MUO, some of the problem can be mitigated by being cleaner about how beans are shelled. I’m also under the impression that the plants aggressively absorb the metal from the soil. Clean soil would help, but I get the nagging feeling the problem cannot be completely eliminated.
@glassbottommeg I always wonder how much of the prevalence of chronic illness in our generation is directly related to this stuff.
@charlesrandall we basically traded lead on the walls for lead just, in the air, and in the ground, and anything that grew in the ground, and so on.
@glassbottommeg my goal has been to reduce it where I can (finding proven non toxic cookware and dishwater((which is already difficult))) to lower the overall load, and then just deal with the rest. As you said, there’s only so much a person can do