Ayurveda is a science of life, therefore it is the science, by the knowledge of which life may be prolonged. It is human nature to aspire for longevity and this desire is found practically among all the peoples of the world. Accordingly if longevity is desired, there must be a system of rejuvenation for one who keeps on remaining young. Rasayana therapy has been described for this person in Ayurveda as a systematic and scientific medical discipline and great results were claimed by this therapy. Hence the Rasayana therapy has been reviewed in the various headings giving its uses, definition, types and formulations etc.