Since billions of people eat turmeric every day (not the same set, but >1 billion each day, surely), if this was an issue we'd have known about it before now.
> Some spice processors in Bangladesh use an industrial lead chromate pigment to imbue turmeric with a bright yellow color prized for curries and other traditional dishes, elevating blood lead levels in Bangladeshis.
You can find links on this site going back years to the fact that adulterating turmeric is a common thing if you think you can get away with it and many think they can even do that on exports.
I'm so sorry you aren't a child in a middle income country?
Most children can be poisoned eventually by a food contamination even if only some percentage of the food is contaminated because most childhoods are years long and most parents don't procure exactly the same supplies..
"Lead in Spices, Herbal Remedies, and Ceremonial Powders Sampled from Home Investigations for Children with Elevated Blood Lead Levels — North Carolina, 2011–2018" [2018]