ABSTRACT
The use of complementary and alternative medicine (CAM) has been growing in Western countries. A 2007 survey by the National Center for Complementary and Alternative Medicine (Barnes et al., 2008) showed that nearly 40% of adults and 12% of children in the United States had used some form of CAM. This compared well with an earlier report of CAM use by 42% of the general population in the United States, 20% in the United Kingdom, and 65% in Germany (Ernst, 2000). In the United States, natural products, which largely consist of herbal or botanical products, accounted for about 18% of CAM therapies used (Barnes et al., 2008) and are sold as “dietary supplements.” Total sales of dietary supplements in the United
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