One thing that's apparent from that report is the year effect. Older, pre-2022 tests were much more likely to have very low levels of heavy metals; more recent,

One thing that's apparent from that report is the year effect. Older, pre-2022 tests were much more likely to have very low levels of heavy metals; more recent, 2022 tests are more likely to have high levels. This is true within brand as well. At least it strongly looked that way with many of the brands I saw. I don't know if that's due to testing effects, or agricultural or processing changes, or shifts in regional supply (maybe due to the pandemic?), or something else. But some of those results make it look like it's a relatively recent, and sharply growing problem.