Reducing power assay. The reductive ability of T. chebula, T. belerica and E. officinalis extracts and standard Ascorbic acid. The absorbance (A700) was plotted against concentration of sample. Each value represents mean ± S.D. (n = 6). *** p < 0.001 vs 0 mg/ml.
Hazra et al. BMC Complementary and Alternative Medicine 2010 10:20 doi:10.1186/1472-6882-10-20