Medical systems like Ayurveda, homeopathy, naturopathy and TCM offer users a spectrum of treatment options and a philosophical system in which to understand them. Although some PHAs have chosen to learn about these systems of health, others look to complementary therapies to address specific health concerns. In this section, we discuss treatments that might have derived from complete medical systems but are now used as stand-alone therapies. In some cases, these are ancient therapies that are still closely tied to traditional systems. Yoga — an important component of Ayurveda — is one example, but many people who use it are not familiar with broader Ayurvedic medical principles. Other therapies in this section are relatively new, like therapeutic touch, which was created by studying a variety of older traditions.