Back in the 70s, they said Red Dye # something would give you cancer. The only thing was that it would have taken several train cars full of it to do any harm. What’s the amount of tumeric would one have to ingest before it did any good?
An excellent question for which I have not an adequate reply.
Might the beneficial effect be cumulative? Might a daily dose of turmeric, hence curcumin, be preventative of certain maladies? I have no idea but the thought occurs.