The original article to which this Erratum refers was published in Phytotherapy Research 14(2) 2000, 107-111. Following publication of this paper in the March 2000 issue of Phytotherapy Research (14(2), 107-111), it has come to our attention that Figure 3 was printed incorrectly. The correct Figure 3 appears below. The publishers would like to apologise for any confusion caused.