Hi--I want to do some experiments with curcumin, but I haven't found a good supplier for high purity material. Any ideas?

I have chemistry training, so I will do chromatography, if necessary.

Sigma-Aldritch have a 99+% pure curcumin, as well as the "natural" mix, which is ~85%+derivatives. I believe E. Merck/Calbiochem have a similar grade also.

I got some Biomol curcumin.
Sigma has 98% curcuminoid (70% curcumin)

Sigma, catalog no c-1386

Sigma's product purity: ~70% (HPLC)