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Atmosphere and feature ratings above are based on Best Retreats research (November 2026). They will be updated if Revermann Shares submits its own information.

Revermann Shares: An In-Depth Review for Ayahuasca Ceremonies in the Netherlands

Revermann Shares is a Dutch ayahuasca practice run by Carlijn Revermann, a process therapist trained in Leela therapy, with her partner Ramses Dunker and co-facilitators named as Ryanne and Riet, that holds weekend retreats with two ayahuasca ceremonies for up to about eight people at undisclosed nature locations in Gelderland and private ceremonies near Appelscha, per its weekend page. It publishes a detailed list of medical and psychiatric exclusions and requires an intake call and health questionnaire. Against that, its own site says ayahuasca use has not been allowed in the Netherlands since 2019, no medical staff or emergency plan is published, the venue is revealed only after booking, its terms shift all risk to participants, and every review it shows is hosted on its own site.

🎯 At a Glance

• Locations: Undisclosed rural venues in Gelderland, Netherlands, for group weekends, with earlier dates in Groningen and Drenthe; private and couple ceremonies at a forest-edge house near Appelscha; therapy sessions in Maarssen.
• Approach: Ayahuasca ceremonies framed as Western process therapy, with live guitar, piano and voice, sharing circles and optional paid Leela therapy and integration sessions. No indigenous lineage is claimed.
• Suitable For: Dutch-speaking or English-speaking adults who accept the legal risk and want a small, therapy-style group. Not suitable for people taking antidepressants or with heart or psychiatric conditions.
• Costs: €745 for a Friday to Sunday weekend with two ceremonies, €650 per person for a couple ceremony and €1,175 for a private ceremony. After a 14-day cooling-off period, cancellation costs 25% under three months, 50% under two months and 100% under one month, and there is no refund for leaving early, per its terms.
• Overall Assessment: Careful screening rules and small groups, offset by an openly unlawful service, no published medical safeguards, one-sided terms and only self-hosted reviews. Directory evaluation: C.

💬 What Guests Are Saying

Its site shows 28 Google reviews from 2022 to 2026 and 31 testimonials on its reviews page, praising safety, warm guidance, live music and aftercare; a few describe a very hard first night or a disappointing first round. Several testimonials repeat in both languages and some posting dates do not match the events described. No listing was found on Retreat Guru, BookRetreats, Tripadvisor or Trustpilot, and no reviews of 3 stars or lower were found. If you have attended, we encourage you to share your experience through our submission form.

🚩 Incident Report

We searched review platforms and English and Dutch-language news for reports involving Revermann Shares, Carlijn Revermann and Ramses Dunker.

• Deaths and serious injuries: None found.
• Sexual misconduct: No allegations found.
• Theft and fraud: None found.
• Legal action: None found.

Co-facilitators are named only by first name and the Dutch business registry was not checked, so this absence offers limited assurance.

If you have experienced or witnessed an incident with this center, please report it confidentially.

🔍 Critical Notes

Who runs it. The business trades as REVERMANN under a Dutch Chamber of Commerce number given in its terms, which list a different town from its contact page. Revermann describes herself as a certified ayahuasca facilitator and process therapist with more than eight years of experience; these credentials are self-reported. The source of the brew is not disclosed. Earlier English pages also sold psilocybin, truffle and “psilohuasca” programs.

Screening and medical support. Its safety page excludes people on SSRIs, SNRIs, antipsychotics, ADHD medication and other drugs, and people with psychosis vulnerability, bipolar disorder, serious heart disease, high blood pressure or epilepsy, but gives no washout times. Ryanne is described only as working in healthcare; no medical staff or emergency plan is published, and the venue is undisclosed, so hospital distance is unknown. Its terms waive liability for injury, require participants to indemnify the business and fine unauthorized recording €5,000 per day. Its stories and therapy pages present memories of early trauma recovered in sessions as fact.

Status. Operating, with weekends listed on its agenda into March 2027.

Legal context. Its own information page states that ayahuasca use has not been allowed in the Netherlands since 2019. The Dutch Supreme Court upheld an ayahuasca import conviction in October 2019, ruling that public health justifies limiting religious freedom, per the Hoge Raad, ending the tolerance Santo Daime churches had since 2001, as NOS reported.

🆘 Screening & Mental Health Risks

Its exclusion list is broader than most, but MAOIs are not named and no taper guidance is given beyond consulting a doctor. ICEERS notes that ayahuasca’s MAOI component makes it dangerous with SSRIs and other serotonergic drugs and that it is contraindicated for people prone to psychosis. Never stop a psychiatric medication to qualify for a ceremony without your prescriber’s guidance.

🧪 Brew Substance

Ayahuasca from an undisclosed source, with doses adjusted per person and an optional second round. Ayahuasca combines the Banisteriopsis caapi vine with a DMT-containing leaf, as Erowid explains.

📍 Location, Setting & Style

• Setting: Rural farm and nature properties in the Dutch countryside; reviews mention a yurt.
• Rooms: Sleeping quarters plus a mattress per person in the ceremony room; three meals a day.
• Style: A small, therapist-led group with live music and an integration call afterward.

Practical guidance: No transport is provided; location details are sent only after registration.

Should You Book?

Only if you accept that the activity is unlawful in the Netherlands. Ask in writing for the venue address, who on site is trained in first aid, the emergency plan and nearest hospital, the source of the brew, and whether the liability waiver applies to injuries caused by staff. Read our guide to verifying retreat facilitators.

The Team & Story

Revermann presents her work as a “Circle of Life” process rooted in therapy, music and nature. We did not independently verify anyone’s training.

Prep & Integration Tips

Before you go: Disclose every medication and condition in writing and plan any change with your own doctor. After you return: Arrange support from a qualified therapist at home. Our guide on how to research ayahuasca incidents can help you check any center.

Pros & Cons

Book Your Ceremony

Dates are listed on its website. Best Retreats does not take bookings; learn more about our mission.

Last reviewed November 2026.

This article is for informational purposes only and is not medical advice. Consult a qualified medical professional.