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Table 2 Effect of administration of aqueous extract of burdock roots for 15 days on serum testosterone concentrations

From: Effect of aqueous extract of Arctium lappa L. (burdock) roots on the sexual behavior of male rats

Parameter Mean frequency ± S.E.M
  Control Burdock extract 300 mg/kg Burdock extract 600 mg/kg Burdock extract 1,200 mg/kg Viagra (60 mg/kg)
Testosterone 2.3 ± 0.4 3.2 ± 0.5 4.3 ± 0.5* 5.2 ± 0.5** 2.9 ± 0.6
  1. S.E.M.: mean standard error. n = 6 (number of animals in each group), significant difference from control, significance level: *p < 0.05, **p < 0.01
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