ABSTRACT

Complementary and alternative medicine (CAM) therapies are used worldwide and are rapidly growing in popularity in the United States. CAM interventions include herbal remedies, megavitamins, minerals, and diet products, the majority of which come from natural sources (McHughes and Timmermann 2005). Indeed, natural products are the CAM therapy most frequently used in the United States (Barnes et al. 2008a).