Table 2.

Percent recovery of spiked milk thistle flavonolignan standards in blank human serum matrix

Analyte	Concentration (ng/mL)
	LLOQ	Recovery %	Low	Recovery %	Medium	Recovery %	High	Recovery %
Silychristin	1.2	81.1	5	94.0	50	93.4	1000	97.7
Silydianin	1.2	97.5	5	91.2	50	93.3	1000	96.2
Silybin A	0.4	83.6	1.2	97.5	50	97.0	1000	102
Silybin B	0.4	83.1	1.2	103	50	96.3	1000	102
Isosilybin A	0.4	85.2	1.2	98.4	50	91.0	1000	98.2
Isosilybin B	0.4	109	1.2	97.7	50	91.3	1000	97.9