Effect of Short-Course Oral Ciprofloxacin on Isoflavone Pharmacokinetics following Soy Milk Ingestion in Healthy Postmenopausal Women

Table 2

Precision and accuracy for assay of daidzein and genistein in human plasma.

Compound	Concentration; (ng/mL)	Within-day (n=5)			Between-day (n=5)
		Measured; concentration; (ng/mL), mean±SD	Precision; (%CV)	Accuracy; (%)	Measured; concentration; (ng/mL), mean±SD	Precision; (%CV)	Accuracy; (%)
Daidzein	110	105.54±1.20	1.14	95.95	112.01±4.41	3.94	101.83
	1100	1169.95±13.06	1.12	106.36	1106.44±57.40	5.19	100.59
	2200	2271.59±24.85	1.09	103.25	2267.39±120.66	5.32	103.06
Average			1.12	101.85		4.81	101.82
Genistein	110	108.79±1.99	1.83	98.90	113.16±8.18	7.23	102.87
	1100	1131.92±12.52	1.11	102.90	1070.99±76.98	7.19	97.36
	2200	2203.29±26.97	1.22	100.15	2199.30±125.02	5.68	99.97
Average			1.39	100.65		6.70	100.07