Traditional Medicines as the Source of Immuno- modulators and Stimulators and their Safety Issues

The practice of medicinal herbs for treating diseases is well known from ancient times (Wasik 1999). More than 80% of the world’s population is dependent on indigenousor traditional or complementary and alternative medicines (CAMs) (Zhang 2002, Geethangili and Tzeng 2009) and a large number of CAM therapies that have been shown to affect the immune system (Mainardi et al. 2009).