Ayurvedic oil or water boiler from real copper.

Ayurveda (Sanskrit: आयुर्वेद IAST Āyurveda, "life-knowledge"; English pronunciation /ˌaɪ.ərˈveɪdə/), or Ayurveda medicine, is a system of medicine with historical roots in the Indian subcontinent Globalized and modernized practices derived from Ayurveda traditions are a type of complementary or alternative medicine. In the Western world, Ayurveda therapies and practices (which are manifold) have been integrated in general wellness applications and as well in some cases in medical use. The main classical Ayurveda treatises begin with legendary accounts of the transmission of medical knowledge from the Gods to sages, and thence to human physicians. Thus, the Sushruta Samhita narrates how Dhanvantari, "greatest of the mighty celestial," incarnated himself as Divodāsa, a mythical king of Varanasi, who then taught medicine to a group of wise physicians, including Sushruta himself.Ayurveda therapies have varied and evolved over more than two millennia. Therapies are typically based on complex herbal compounds, while treatises introduced mineral and metal substances (perhaps under the influence of early Indian alchemy or rasaśāstra). Ancient Ayurveda treatises also taught surgical techniques, including rhinoplasty, perineal lithotomy, the suturing of wounds, and the extraction of foreign objects. Although laboratory experiments suggest it is possible that some substances in Ayurveda might be developed into effective treatments, there is no evidence that any are effective as currently proffered.[Ayurveda medicine is considered pseudoscientific. Other researchers consider it a protoscience, or trans-science system instead. Close to 21% of Ayurveda U.S. and Indian-manufactured patent medicines sold through the Internet were found to contain toxic levels of heavy metals, specifically lead, mercury, and arsenic. The public health implications of such metallic contaminants in India are unknown.