Dr Gabor Mate - Physician / Author
Graham Hancock - Author
Amanda Feilding - Director The Beckley Foundation
Dennis McKenna PhD - Ethnobotanist
Rick Doblin PhD - Director MAPS
Holly Harman - Holotropic Breathwork Trainer / Facilitator
Dr Ben Sessa - Neuroscientist / Psychiatrist
William Rowlandson - Lecturer / Author
Maria Papaspyrou - Psychotherapist
Dr Tim Read - Consultant Psychiatrist
Dr David Luke - Psychologist
Yanai Postelnik - Senior Meditation Teacher