Biologist with a master’s degree in Geography at Universidade de São Paulo. PhD and post-doctorate at Escola Paulista de Medicina. Since 1995, has been developing more than 40 Ethnobotany projects among indigenous, Afro-Brazilians, Amazonian and Ribeirinhos, focusing on psychoactive substances; adding about 70 publications. Full Professor and coordinator of the Center for Ethnobotanical Studies at Universidade Federal de São Paulo. Author of the book "Invisible Psychoactives".