Curcumin is one of those compounds that does everything, that's not necessarily a good thing, it is a hit in every assay. When you google compounds and they are antifungal, antidiabetic, antibacterial, anticancer, etc., it isn't a reason to get excited, they have no specificity.
Source: I work in natural products chemistry.
https://en.wikipedia.org/wiki/Pan-assay_interference_compoun...
http://blogs.sciencemag.org/pipeline/archives/2017/01/12/cur...