Ayahuasca (Caapi only)

Traditional ayahuasca is a brew combining Banisteriopsis caapi (MAOI vine) with DMT-containing admixture plants, most commonly Psychotria viridis. "Caapi only" uses the vine alone, without any DMT source. This produces a fundamentally different, non-psychedelic experience focused on the direct pharmacological effects of the beta-carboline alkaloids — primarily harmine, harmaline, and tetrahydroharmine.

Some practitioners use low doses of B. caapi (0.5–2g dried vine, or 0.4–1g extract equivalent) for mood support, neuroplasticity, and anxiety reduction. Unlike full ayahuasca, caapi-only microdosing does not produce visions. However, even at low doses, the MAO-A inhibition from beta-carbolines is pharmacologically active, meaning dietary and drug interactions must be taken seriously at any dose level.

Beta-carboline alkaloids inhibit MAO-A even at low doses. This creates meaningful interactions with tyramine-rich foods (aged cheeses, cured meats, fermented products, certain wines) — potentially triggering a hypertensive crisis — and with serotonergic medications including SSRIs, SNRIs, tramadol, and stimulants. These interactions are not dose-dependent in the way that psychedelic effects are. Caapi vine is not pharmacologically mild at any dose and requires the same dietary and medication precautions as clinical MAOI drugs.

Preclinical evidence suggests harmine and related alkaloids may have antidepressant effects through multiple mechanisms: MAO-A inhibition, DYRK1A inhibition, BDNF stimulation, and neurogenesis promotion in animal models. Observational studies of ayahuasca users have documented sustained antidepressant effects, though isolating the caapi vine's contribution from DMT effects is methodologically difficult. No controlled clinical trials have evaluated caapi vine alone for depression.

Banisteriopsis caapi vine is legal in most countries, including the United States and most of Europe, where it is sold as a botanical supplement. It is not scheduled under international drug control conventions. Concentrated extracts may have different regulatory status in some jurisdictions. Always verify current local regulations before purchasing.