Chinese Herbal Medicine dates back thousands of years, with the first recognised textbook, the Shen Nong Ben Cao, written on it in the first century BC.
As far back as humanity existed in China, Chinese herbalists began to experiment on themselves and their patients. And over the millennia through their direct experience and gathered knowledge of millions of human trials they discovered which herbs were toxic and could not be used, and which others were beneficial in the elimination of illnesses. They also discovered a multitude of herbs for strengthening and prolonging the life of the human body and mind.