In this documentary, “Zappy” Zapolin interviews spiritual gurus, celebrities, and people of various faiths about the relationship between spirituality, religion, and psychedelics—in their beliefs and in their experiences.

Through interviews with leading psychologists and scientists, Neurons to Nirvana explores the history of four powerful psychedelic substances (LSD, Psilocybin, MDMA and Ayahuasca) and their previously established medicinal potential. Strictly…