I could not find references about this one, but I found:
Ground Turmeric as a Source of Lead Exposure in the United States https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415259/
Man, first we will have to put some moral-science as their mandatory subject to clear..
As with most things, the truth is probably somewhere in the middle.
[0]: https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5415...