Singlet oxygen scavenging assay. Effect of T. chebula, T. belerica and E. officinalis plant extracts and standard lipoic acid on the scavenging of singlet oxygen. The results are mean ± S.D. of six parallel measurements. **p < 0.01 and ***p < 0.001 vs 0 μg/ml.
Hazra et al. BMC Complementary and Alternative Medicine 2010 10:20 doi:10.1186/1472-6882-10-20