Research Article

Antioxidant Effects and Cytoprotective Potentials of Herbal Tea against H2O2-Induced Oxidative Damage by Activating Heme Oxygenase1 Pathway

Table 1

Content and antioxidant activity of phenolic acids in Wanglaoji herbal tea.

Phenolic acidContent (μg/g)Antioxidant activity (μM)
DPPH (IC50)1FRAP (EC50)2

Rosmarinic acid15.210.0
Isochlorogenic acid C11.711.1
Neochlorogenic acid33.126.8
Cryptochlorogenic acid29.123.1
Protocatechuic acid17.925.3
Caffeic acid22.010.8

1IC50: the concentration of decreasing the initial DPPH concentration by 50%. 2EC50: half effective concentration at which the absorbance was equal to 0.5.