Synthesis offers legal, medically supervised, and scientific based psychedelic retreats in Amsterdam. They make the psychedelic experience accessible for curious individuals who want to utilize moderate-to-high doses of psilocybin truffles to catalyze creative breakthroughs, explore consciousness, find meaning, improve confidence, and search for a mystical experience.



Martijn is the Co-Founder of Synthesis as well as HighExistence and Apotheosis; he has a background in interdisciplinary science and philosophy, and with a strong foundation in coaching and entrepreneurship, he aims to make psychedelic tools accessible in a safe, legal, and modern context.