Plants preferentially absorb heavy metals from the soil, leading to higher concentrations in vegetarian diets.

“plants take up these heavy metals preferentially as part of their growing process and this is interesting to me because I hadn't even thought about this as a problem for humans when they're eating salads or eating leafy greens heavy metals in leafy greens we don't think about that we think about heavy metals and fish but if you really look at the research there's significant amounts of cadmium other heavy metals in leafy greens in fact today I believe on my social media we're posting a reel about thallium and kale and thallium is another type of heavy metal that has been found in kale”