Rasa Shastra and Mercury Therapy: The Marvels of Ancient Indian Alchemy and Chemistry

Rasa Shastra, an integral specialized branch of Ayurveda emerging predominantly between the 8th and 16th centuries CE, represents one of the world's most sophisticated early traditions of proto-chemistry, metallurgy, and iatrochemistry. Centered on Parada (elemental mercury, Hg), Rasa Shastra transformed toxic metallic and mineral substances into stable, biocompatible therapeutic formulations known as Bhasmas (calcined micro/nano-materials) and Kupi Pakwa Rasayanas (sublimated mercurial compounds).