Medicinal plants
His main research area is medicinal plants of Antiquity, his approach being transdisciplinary, that is, not only philological and historical, but also botanical and medical, ethnological and anthropological, constituting ethnobotany and ethnopharmacology. In 2005, Touwaide received a grant of the National Institutes of Health for a four-year research project “Medicinal plants of Antiquity: A Computerized Database”. Ancient Greek therapeutical texts were digitized, indexed and analyzed both in the original and in translation.