Paracelsus -

(Theophrastus von Hohenheim) was a Swiss physician, alchemist, and philosopher of the German Renaissance. He revolutionized medicine by bridging the gap between scientific observation and spiritual mysticism.

He identified that inhaled dust, rather than evil mountain spirits, caused lung diseases in miners. Paracelsus

He introduced inorganic substances like mercury, sulfur, iron, and copper sulfate to cure diseases. rather than evil mountain spirits