The Substance: Albert Hofmann's LSD

The Substance: Albert Hofmann's LSD is a 2011 Swiss documentary film written and directed by Martin Witz. Drawing on material from more than fifty film archives, it examines the history of LSD. In 2012, the film won awards at PARISCIENCE and the Berlin & Beyond Film Festival, and it was screened at festivals including Locarno, Göteborg, and Seattle.