Table 4

Total plasma daidzein pharmacokinetic parameters after dosing with 43% genistein (means ± SD)

Genistein dose level (mg/kg)Daidzein dose level (mg/kg)No. of patientsTmaxab (h)Cmaxm)AUC0-∞m·h)Apparent T1/2c (h)CL/F (liters/h)VZ/F (liters)MRT (h)
20.9844.5 (1–48)2.36 (1.85)27.7 (22.0)6.69 (2.32)d25.6 (30.8)d206.0 (198.6)d10.37 (1.18)
41.9534.5 (4.5–6)9.88 (6.54)167.9 (118.3)9.20 (16.70)7.42 (5.79)100.7 (21.4)21.98 (14.4)
83.9138 (6–24)10.11 (4.23)481.3 (636.1)7.48 (4.86)8.16 (6.16)85.4 (9.0)32.9 (36.5)
Totals106.0 (1–48)7.65 (4.58)13.7 (18.3)134.1 (114.2)21.7 (21.9)
  • a Tmax, time of maximal plasma concentration; Cmax, maximal plasma concentration; AUC0-∞, area under the concentration-time curve extrapolated to infinity; CL/F, apparent clearance; T1/2, apparent terminal half-life of elimination; VZ/F, apparent volume of distribution during the terminal elimination phase.

  • b Median and range.

  • c Harmonic means and pseudostandard deviations.

  • d Unable to estimate terminal elimination in one patient, n = 3.