Costa Rica mushroom law · primary sources first
This is the part most travelers never get told cleanly. The mushroom in the grass and the molecule in a lab are different legal objects. International control, on INCB’s own wording, is about the substance in its molecular form. Costa Rica still reads each form — mushroom, food, extract, commercial product — on its own terms.
TL;DR · INCB 2025
“only the substance in its molecular form is controlled.”
INCB says naturally occurring fungal material — including mushroom species containing psilocybin and psilocin, and preparations made from natural fungal material — is not under international control under the 1971 Convention merely because it contains those molecules. INCB also says national governments may adopt broader domestic controls.
The Ministry of Health list reviewed in August 2026 expressly names psilocybin and psilocin, without a separate entry for the Psilocybe organism. The 1971 treaty framework controls the molecules; INCB expressly distinguishes natural fungal material. Costa Rican law also uses broader domestic terms — “drugs, substances or products” — whose application to an intact mushroom remains unresolved in the published decisions located by our research. Absence of a species name alone cannot settle that question.
Personal consumption itself is outside Article 58’s trafficking offense. Authoritative summaries describe possession for personal use as decriminalized; there is no fixed statutory quantity allowance. Authorities assess the circumstances and purpose, and confiscation can still occur.
Products, therapeutic advertising and administration can engage Ministry of Health registration, establishment and professional requirements alongside criminal law. The Ministry’s January 2025 ayahuasca and ibogaine warning makes these obligations explicit. A retreat’s existence establishes neither authorization nor a legal exemption.
Article 58 provides a general 8–15-year prison range for specified unauthorized trafficking and supply conduct involving controlled drugs, substances or products. Quantity can be evidence of purpose, but no single amount automatically separates personal use from trafficking. Visitors considering any supply or commercial activity need qualified Costa Rican legal advice.
Personal-use non-criminalization leaves supply as a separate legal question and leaves the status of each mushroom, preparation, extract, food or commercial product dependent on its form and activity.