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Table 5 Quenching of the DPPH Radical and H2O2 by Dietary Antioxidants

From: Dietary antioxidants protect gut epithelial cells from oxidant-induced apoptosis

Treatment Cat's claw Green Tea Vitamin C
H2O2 ND ND 4.6
DPPH 22.7 15.7† 5.2*
  1. Results are expressed as the half-maximal concentration (EC50, μg/ml) required to quench either H 2O2 or DPPH radicals, determined by inhibition of absorbance at 240 and 515 nm, respectively. *P < 0.05 vs. other treatments † P < 0.05 vs. Cat's claw ND Not detected