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Scavenging effect of broccoli extract (BE) and 2,6-ditert-butyl-4-hydroxytoluene (BHT) against 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical formation. Controls contained all the reaction reagents except BE or BHT. Results are means±SD of five measurements. Values with different letters (a–e) are significantly higher as compared to lower doses of the BE, at P<0.05.
