Concept of Ayurvedic Shodhana Process - Not Mere purification

In Ayurveda, the concept of shodhana for the potential herbs, minerals and metals was got references available since the time of Ayurvedic classics but the details about procedure could be traced only after the development of Rasashastra/ Rasachikitsa (Mineral therapy). It also mentioned that shodhana responsible for the alteration or addition of the properties of the drugs while subjected to various pharmaceutical operations and treatments. It is processes of detoxification by which not only physical and chemical blemishes and toxic materials are eliminated but to convert them to the pharmaceutically suitable forms in which these may be absorbed into the system if used internally or may be treated further. The substance which has to be purified is called as Shudhidravya/ shodhya dravya and the substance with which it is treated for purification called Shodhana dravya. Shodhana are the tools to bring poisonous medicinal plants into the mainstream and to make them more accountable.