Table 3.

Effects of flavonoids on CYP2E1 isozyme activities (x ± s, n = 3).

Concentration (μM)	Inhibition Rate (%)
	Clomethiazole	Quercetin	Kaempferol	Isoquercitrin	Astragalin
4	85.41 ± 4.78	12.54 ± 0.81	16.49 ± 1.23	21.12 ± 1.56	16.16 ± 1.13
2	68.15 ± 4.97	9.99 ± 0.71	7.12 ± 0.50	22.06 ± 1.12	15.58 ± 1.02
1	48.70 ± 2.19	7.21 ± 0.43	5.50 ± 0.29	18.91 ± 1.43	13.97 ± 0.81
0.5	25.99 ± 1.27	5.46 ± 0.33	5.09 ± 0.37	16.27 ± 0.83	6.14 ± 0.45
0.25	18.49 ± 0.59	3.68 ± 0.30	0.97 ± 0.80	16.02 ± 1.05	1.73 ± 0.13