IMMERSION

If you're still exploring whether this experience is a good fit for where you are right now, we invite you to take our short readiness quiz:

It’s a reflective 2-minute self-assessment designed to help you gain clarity and understand the next best step.

Take the Quiz

At Synthesis, your safety is our highest priority. While a psilocybin retreat can be deeply beneficial for many, it is not appropriate for everyone. Certain medical and psychological conditions may present contraindications that make participation inadvisable.

Our health screening process exists to ensure that each participant can engage with this experience safely and with appropriate support. A dedicated clinical team reviews every application using evidence-based guidelines to assess readiness and suitability.

The following are considered contraindications that would deem someone ineligible to participate in the program. These include, but are not limited to:

• Suicidal ideation or a history of attempted suicide
• Schizophrenia
• Psychosis (including manic episodes)
• Personality disorders, including borderline personality disorder
• A history of psychiatric hospitalization
• Any dissociative disorder, including dissociative identity disorder
• Self-harm or self-destructive behavior, including but not limited to cutting, burning, or similar self-inflicted wounding, excessive substance use, or regular high-risk behavior

Our facilitation team includes Lead Facilitators and Facilitators, all well-trained, experienced, and supervised to support you at every stage of your journey. With one facilitator for every three to four participants, you can expect attentive, personalized care throughout your retreat.

At Synthesis, we use a tea made from psilocybin-containing truffles. Truffles are an earlier stage of mushroom development that contain psilocybin and produce psychedelic effects when ingested. Unlike dried psilocybin mushrooms, truffles are legal in the Netherlands, where our retreats are held.

Dosage is determined through a collaborative, consent-based process. You will discuss and agree on your dosage during a one-on-one session with your facilitator on-site at the retreat.

Generally, the first ceremony uses 15g of psilocybin-containing truffles. For the second ceremony, dosage can be adjusted up to a maximum of 30g, based on your experience and in consultation with your facilitator.

Our retreats take place at New Eden in the Netherlands, approximately 90 minutes from Amsterdam. 

New Eden offers simple, clean accommodations across several buildings on the grounds, with a mix of single and double rooms,  all with private toilets.

Room assignments are made at the discretion of our retreat team. We do our best to accommodate couples and family members in double-occupancy rooms whenever possible.

Single participants are assigned rooms with single beds, separated by gender. If you're attending alone, you'll share with a participant of the same gender.

All meals at New Eden are vegetarian, organic, seasonal, and locally sourced. Coffee, herbal teas, fresh fruit, and nut snacks are available between meals.

Our kitchen team is happy to accommodate individual dietary requirements and lifestyle preferences. We will collect this information from all participants ahead of your retreat.

Participants are responsible for arranging their own transportation to and from the venue.

Synthesis will provide an optional group shuttle service that can be added to your reservation. More details provided at checkout.

Yes. Once your Health Screening Questionnaire is approved, you'll be prompted to sign the service agreement and select your preferred payment option:

Full Payment: Pay your tuition in full at the time of registration.

Two-Installment Plan: Split your tuition into two equal payments. The first payment is due at registration, with the remaining balance charged 30 days later using the same payment method. Please note that this plan is only available for bookings made more than 30 days before your retreat start date.

We'd love to hear from you. You're welcome to schedule a complimentary 15-minute Discovery Call with a member of our team here.

Attendance at all online Preparation and Integration Sessions is an essential part of the program experience, and we ask that all participants plan to attend each session.

While we understand that extraordinary circumstances can occasionally arise, we strongly encourage you to confirm your availability for all sessions before registering.