Table 5.

Quenching of the DPPH Radical and H₂O₂ by Dietary Antioxidants

Treatment	Cat's claw	Green Tea	Vitamin C
H2O2	ND	ND	4.6
DPPH	22.7	15.7†	5.2*

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