Pharmaceutical biologist (Dr. rer nat.habil, Univ. Freiburg 1989, 1997, Dipl. Biol, 1985) / pharmacognosist, and anthropologist (M.A., Wayne State Univ, 1982), with a many years of research experience in a multitude of generally transdisciplinary aspects of medicinal and food plant research (esp. bioactive natural products), as well as at the interface of cultural and natural sciences especially on the traditional use of food and medicinal plants for example in Mexico and the Mediterranean.