Embark on a deep journey

with our psychedelic retreats and training programs in the heart of the Netherlands

2025 Calendar

Experience the unique potential of psychedelics

At the Experiential Training Institute, we offer experiential training programs for mental health professionals and retreats for couples and individuals seeking to explore psychedelics in a safe and legal setting. Our psilocybin-containing truffle programs provide a powerful and transformative opportunity to delve into the psychedelic experience, deeply exploring mind, body, and spirit.

Who we are

Our programs

Personal Journeys

Ready to take your professional and personal development to the next level?
In our individual program, you will get exclusivity, full discretion and our undivided attention. This program is suitable if you are ready to confront yourself on the deepest level.
- Professional & personal development
- One-on-one & full discretion
- Leadership focus
Tailored to your needs.
price upon request

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Small Group Retreats

Are you curious about how psychedelics might support you in connecting to deeper levels of consciousness and are you searching for personal growth?
Our 3-day retreat program for small groups is designed to facilitate transformational changes in your life and it is medically supervised, legal and of the highest standard.
- Small groups with max 8 participants
- Personal growth
- Professional guidance
3-day retreat
Amsterdam:
€2,450
excluding accommodation
excluding 21% VAT
Culemborg:
€2,950
including accommodation
excluding 21% VAT

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Practitioner Training

Are you a professional looking to expand your expertise in psychedelic-assisted therapy? Our Psychedelic-Assisted Psychotherapy Certification Program is designed to equip wellness practitioners and clinicians with the knowledge, experience, and practical skills needed to integrate psychedelic-informed practices into their work. Led by an experienced psychologist and psychiatrist team, this unique training. combines in-depth online teachings with an immersive, hands-on retreat.
12-month program
Education Module - €1,500 (exempt from VAT/vrijgesteld van BTW)
Online live lectures: 13 hours of interactive, expert-led sessions
Experiential Module - €3,850 (including meals, excluding VAT & accommodation)
4-day immersive retreat: hands-on training with supervised facilitation practice
Total Program - €5,000 / Early Bird Rate €4,800
To make this comprehensive training more accessible, we offer a flexible payment plan, allowing you to spread the cost across three instalments.

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Where science meets ancient wisdom

We’re committed to facilitating psychedelic experiences which respect ancient traditions while bridging the gap with western psychology. Through our carefully designed, and evolving, programs we guide our clients through preparation, exploration, and integration within a safe and ethnical environment, providing the optimal conditions to discover new perspectives and meaning.

Our approach

“I am so grateful to have had an enriching and profound retreat experience with Hans and Jeanine of Experiential Training Institute at The Matter in Culemborg."

Vicki, Australia
"Hans and Jeanine are such a dynamic team, with depths of knowledge and a passion for training. I learned so much about the medicine and myself. I think the way they set up the event was very thoughtful."

Hilary, USA
"I was deeply inspired by the depth of healing & connection cultivated in such a short time... wow. Coming to the Netherlands from the US allowed me to be far enough from the various stressors of daily life to be fully present and completely immersed in the experience."

Mindy, USA
"This experiential training was profound in so many ways. I experienced so much growth, both personally and professionally. Jeanine and Hans were incredible, I felt safe and supported the entire time. I am leaving changed for the better. Thank you!"

Erin H
"It was a life changing experience attending ETI's 3 day retreat in Culemborg, Holland. What I particularly liked was how professional Hans, Jeanine and their team are. I felt safe and there was always one of them there to support me when I needed it. Thanks for the beautiful journey!"

Katriona