Metsa Niwue (François) is the senior Western apprentice to Guillermo Arévalo and a curandero in his own right.
Ronin Niwe (Dave) is from British Columbia, Canada. He has been an apprentice of Guillermo Arévalo for the past seven years.
With over 35 years experience in the field of Amazonian shamanism, Guillermo Arévalo is recognized worldwide as a master curandero or healer.
Kenneth Tupper is a Ph.D. candidate in the Department of Educational Studies at the University of British Columbia.
Dr. Gabor Maté is the staff physician at the Portland Hotel, a residence and resource centre for the people of Vancouver’s Downtown Eastside and one of the experts interviewed in Vine of the Soul.