- Ralph Abraham, PhD
- Joel Bakst
- Steven Barker, PhD
- Susan Blumenthal
- Erik Davis
- Patricio Dominguez
- Ede Frecska, MD PHD
- Robert Gable, PhD
- Cynthia Geist
- Neal Goldsmith, PhD
- Alex Grey
- Allison Grey
- Roland Griffiths, PhD
- Charles Grob, MD
- Stanislav Grof, MD
- Graham Hancock
- Kathleen Harrison, PhD
- James Kent
- Larry Leeman, MD
- Mathias Lorenz
- Dennis Mckenna, PhD
- Ralph Metzner, PhD
- Christian Meuli, MD
- Andrew Newberg, MD
- David Nichols, MD
- Dale Pendell
- Daniel Pinchbeck
- David Presti, PhD
- Jordi Riba, PhD
- Marko Rodriguez, PhD
- Douglas Rushkoff
- Bob Schrei
- Benny Shanon, PhD
- Huston Smith, PhD
- Antonopoulos Spiros
- Leanna Standish, ND, PHD
- Andrew Stone
- Rick Strassman, MD
- Robert Weisz
- Slawek Wojtowicz, MD
- Don Wright
