The yield levels of C. zedoaria and
C. malabarica are also high compared to C. longa (turmeric) besides
being free fromany major pests. Though poor in color, (curcumin about
1–2%) the easy availability coupled with very low price would attract
turmeric powder manufacturers to use C. zedoaria/C. malabarica as an
adulterant of C. longa, irrespective of the spice/medicinal value or its
toxicity. C. zedoaria/C. malabarica are reported as toxic