I get my curcumin online because iy is readily available. My choiceof many brands is GNC, but have also used others. I order 1000 mg 95% curcuminoids with black pepper extract. It is water soluble, so doesn't stay in your body long. enhances blood thinners and may inhibit iron absorption if taken at same time. Otherwise can be taken many times a day.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5664031