Jacques Fleurentin is a pharmD, an ethno-pharmacologist and president of the french society of ethno-pharmacology. Passionate about traditional medicine and botanics, he worked in Yemen in 1976 in a cooperative medical mission in Taez. There, he studies traditional pharmacopea and the practices of traditional physicians. Creator of the french society of ethopharmacology and redactor in chief of the journal Ethnopharmacologia. He redacted several books on the subjects of medicinal plants.