Rasayana

Rasayan, a Sanskrit word (with literal meaning: Path (ayana) of the Juice (rasa), or Elixir vitae), is used to describe chemistry and alchemy, and chemistry is generally called Rasayan Shastra in Sanskrit, Nepali, Marathi, Hindi, Kannada and several other languages. Ancient rasayan texts center around the use of prepared forms of mercury or cinnabar (see samskaras), as do occidental alchemical texts. However, there is also ample mention of the preparation of medical tinctures in the ancient science of rasayan; rasayan is in fact a part of Ayurveda.