Synthesis — Netherlands Psychedelic Retreat

Synthesis is one of the most prominent Dutch psychedelic truffle retreat operators, offering multi-day therapeutic retreats using legal psilocybin truffles (Psilocybe tampanensis and P. mexicana sclerotia) in Amsterdam and surrounding areas. The Netherlands permits the sale and possession of psilocybin truffles for adults, making it one of the few legal retreat destinations for European and international clients. Synthesis programs include medical screening, preparation sessions, truffle ceremonies, integration support, and follow-up coaching.