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Inner work · self-exploration

Inner work · Self-exploration

For people already doing inner work who want a deeper, structured setting.

If you are committed to personal growth and self-awareness and want to explore deeper layers with professional support, ONCE offers a carefully held psilocybin-assisted pathway with screening, clinical support and integration.

Start a confidential preliminary assessment
  • Professional screening
  • Supervised access in Amsterdam
  • No promises, no hype

The ONCE pathway is not a replacement for medical or mental-health care.

An open handwritten journal, a mug and books on a wooden table by a window overlooking an Amsterdam canal

You might be in the right place if:

You are already doing inner workYou meditate, journal, do therapy or other practices, and want to go deeper.
You feel called to explore moreYou sense there are deeper patterns or questions you want support to explore.
You want a structured, carefully held settingYou are not looking for intensity, but for depth with guidance.
You are ready for a meaningful stepYou want an approach that respects your process and supports integration.

About the ONCE pathway

ONCE is a professionally supported pathway that combines psilocybin-assisted sessions with psychological preparation and integration.

It is not a retreat or a workshop. The pathway is built around professional screening, carefully structured access and evidence-informed practices. It makes no promise of a particular result.

Everyone begins with a confidential preliminary assessment to help understand your situation and whether this pathway may be appropriate for you.

  • Individual assessmentYou share what brings you here. We look at your mental and physical health, your experience with inner work, and what you hope to explore.
  • Professional reviewQualified clinicians review your summary to consider suitability and risk. You may be invited for a screening conversation.
  • Preparation & in-person daysIf the pathway is appropriate, you continue with preparation, your in-person session in Amsterdam, and integration support afterwards.
  • Integration & follow-upYou are not alone after the experience. We support you in making sense of it and relating it to everyday life.
Learn how the pathway works

What research suggests

In controlled academic studies, some participants reported experiences they described as personally or existentially meaningful after psilocybin-assisted sessions, alongside changes in well-being.

Results vary between individuals and study populations. It is not possible to predict how any one person will respond.

See evidence and sources
60–70%of participants in some studies reported a meaningful spiritual or existential insight after psilocybin-assisted sessions.Figure pending source verification
40–60%of participants showed improvements in measures of well-being and life satisfaction in several clinical studies.Figure pending source verification

Research is evolving. ONCE does not promise specific outcomes.

Curious if this pathway could be relevant for you?

Start a confidential preliminary assessment

Takes about 4 minutes. You read your full summary before any contact details are requested.