Ayurveda is very eternal science. Propagation of Ayurveda on the earth starts from god Bramha to Daksha Prajapati to Ashwini Kumara to Indra. In human being it went on progression and propagating by the tireless efforts of Acharya Punarvasu Atreya, Devodas Kashiraj (Dhanvantari), Bharadwaj Rushi, Charaka, Sushruta, Vagbhata, Nimi, Nagarjuna etc