Quality assessment of Curcuma dietary supplements: Complementary data from LC-MS and H NMR.

Due to the numerous potential health benefits of Curcuma, turmeric dietary supplements (DS) are among the top selling products. To assess the quality of these formulations, thirty Curcuma DS along with five standard Curcuma rhizomes were analyzed with UHPLC-MS and H NMR. The chemometric treatment of the UHPLC-MS spectra showed a significant variability of their chemical composition that was confirmed by H NMR which allowed the absolute quantification of the Curcuma major bioactive components, i.