About us

Mental Health Temple

We were founded by Dora Vermanen and we work from Vijfhuizen, between Amsterdam and Haarlem. We have guided psilocybin ceremonies since 2018.

Dora Vermanen, Melanie de Jong and Kelly Schuller at Mental Health Temple

Small groups

Two facilitators guide a group of no more than ten participants.

Intake first

We discuss health, medication, motivation and suitability before you take part.

No guarantees

We do not promise healing, symptom relief or a particular experience.

One location

Ceremonies take place at our practice in Vijfhuizen, with free parking.

Who guides the ceremonies

Every ceremony is guided by two of us. Kelly does the intake and the follow-up call in English, so you can arrange everything in English from the first phone call onwards.

Dora Vermanen, Founder and lead therapist

Dora Vermanen

Founder and lead therapist

Dora founded Mental Health Temple and has worked as a therapist for more than twenty-five years. Her approach is warm and direct.

EMDRHypnotherapyNLPTruffle ceremoniesFamily constellations
Kelly Schuller, Educational psychologist

Kelly Schuller

Educational psychologist

Kelly graduated from the University of Amsterdam. She guides group, private and duo ceremonies, and she handles the intake call beforehand and the follow-up call afterwards. Both in Dutch and in English.

Children and adolescentsFamily guidanceTruffle ceremonies
More about Kelly
Melanie de Jong, Hypnotherapist, energetic therapist and astrologer

Melanie de Jong

Hypnotherapist, energetic therapist and astrologer

Melanie guides ceremonies and gives individual therapeutic sessions. She also does astrological readings and meditation evenings.

HypnotherapyAstrological readingsIntuitive workTruffle ceremonies
SJ

Sandra Jongbloed

Facilitator

Truffle ceremonies

Guidance, not medical treatment

A ceremony with us is not medical psilocybin therapy, and we are not a research institution. We guide you through a day; we do not treat you.

Screening and preparation help us determine whether taking part appears suitable for you. They do not replace advice or treatment from a doctor, psychiatrist or another regulated healthcare professional.

Prefer to speak first?

Use the English contact form to tell us what you are looking for. We will then tell you whether the setting, the date and the language support fit your situation, before you decide anything.

What participants say afterwards

These reviews were written in Dutch and translated here in full. Most were left on Google; the rest were sent to us directly.

My second inner journey really gave me something. Where I would normally put up a wall, being introverted and used to keeping my feelings in, the ceremony gave me room to open those shutters. I came back to my core, as it were: I know who I am again. Empathetic, calm, and willing to actually show that to my girlfriend, my children and the people around me. The guidance, the music and the ritual setting made me feel safe enough to turn inward. What has stayed with me most is that the insights did not come from outside but from myself, which means I can carry them into daily life. That is exactly what makes it valuable: it does not stop when the ceremony stops. I am grateful for this experience and for the work that starts now. I would recommend it to anyone willing to look at themselves honestly.

Ivo · October 2026 · Sent to us directly

Last weekend I did the Psi ceremony with Kelly and Sandra. A warm welcome, a pleasant room, clear explanations. I went in open and without expectations, and before long the truffles began to work and my inner journey started. It was not frightening; it brought me so many insights. I was able to let things go and there was relief, a kind of liberation. To me it feels like a new beginning. I am leaving things behind and looking at the future with confidence.

Kim Hoekstra · September 2026 · Sent to us directly

My first psilocybin ceremony. I found it really nerve-racking, but I went in without expectations. And it was truly wonderful. So much processed in a single day. Dora and Sandra were also so very kind to everyone. So much love and warmth from the moment you walk into the calm setting of the building. And a lovely meal to finish. I can genuinely recommend it to anyone and I will certainly go again. Thank you Dora and Sandra for this remarkable journey.

Jeannet van Rij · September 2026 · Sent to us directly

I did the Holy Ceremony in February, after several Psi Days and EMDR over the past years. Where my personal growth had been noticeable and my backpack had grown lighter, this ceremony needed to land. In fertile ground, I now dare to say. That last piece I could not quite reach, or did not quite dare to go to, finally arrived, with all the loving support I could have wished for. Coming home in myself. I cannot describe it any other way. Now, almost eight months later, I have got to know myself again. My real core. Before life came over it. I can only encourage and recommend that everyone give this to themselves. Being happy sounds so much easier than it is, but if you dare to take the leap it is worth every second. I am grateful for Dora's guidance, which leaves you able to put the pieces of the puzzle in the right place yourself afterwards.

Sas Van Der Meij De Bie · December 2025 · Google review

I have been coming to Dora for a while now and have worked very hard on myself over the past years. Thanks to her loving guidance and support I have been able to take enormous steps in my personal growth. I am extremely grateful for that. The Psi Day was once again a beautiful and remarkable experience. It helped me dive deeper into myself and discover new insights. The safe and warm environment that Dora and the team create meant I felt completely at ease. I am hugely grateful for this transforming experience and for Dora's support. For anyone looking for inner growth and connection, I can genuinely recommend this.

Anne · February 2025 · Google review

Last Saturday I was able to take part in the Holy Ceremony. What a beautiful day it was. A very special experience, and extra special to go through it together with my son. The week before I did the Psi Ceremony, also very special because I was there with my daughter. At first I found it all quite nerve-racking, but the atmosphere at Dora's is so warm. I am extremely glad I got to experience all of this. Dora, Zoë and Sandra, thank you so much for two beautiful days.

Corien · May 2025 · Google review

Ready to choose a ceremony date?

View the available group ceremonies and book directly in English. You can also contact us first if you have a question.