Ayahuasca research has grown substantially since 2010, with more than 50 peer-reviewed studies examining how this sacred medicine affects brain connectivity, emotional processing, and experiences of spiritual well-being.
What Western science is beginning to document — carefully, with important caveats about small sample sizes and methodological limitations — aligns with what indigenous Amazonian traditions have understood for generations: that ayahuasca engages dimensions of human experience that most interventions cannot reach.
This page maps the current research landscape — what scientists have found, where genuine gaps remain, and why the sacred ceremonial experience rooted in spiritual intention, icaros, community, and facilitator guidance offers something no clinical protocol can fully replicate.
Key Takeaways
More than 50 peer-reviewed studies since 2010 have examined ayahuasca, with leading research from Imperial College London, University of São Paulo, MAPS, and the Beckley Foundation.
Research suggests ayahuasca may temporarily reduce default mode network activity and support neuroplasticity — preliminary findings, not established clinical facts.
A 2019 randomized controlled trial found significant reductions in depression scores in 29 participants with treatment-resistant depression; effect sizes were large but replication in larger studies is needed.
Sacred ceremony includes intention, icaros, facilitator relationship, community, and spiritual context — dimensions that no clinical research protocol can fully capture or replicate.
The Ayahuasca Research Landscape Today
Interest in ayahuasca science has followed the broader wave of psychedelic research revival. After decades of limited scientific inquiry, the first peer-reviewed studies on ayahuasca's psychological effects began appearing in earnest in the early 2000s. By the 2010s, research had accelerated significantly, driven by teams at Imperial College London, the University of São Paulo, the Beckley Foundation, and MAPS (the Multidisciplinary Association for Psychedelic Studies).
Today the literature spans dozens of observational studies, a growing number of controlled trials, and several systematic reviews. Researchers have studied ayahuasca's acute effects on perception and cognition, its impact on neural connectivity measured via fMRI, its relationship to measures of emotional processing and mindfulness, and early findings on mood and well-being in both clinical and naturalistic ceremonial settings.
It is worth noting where much of this research takes place. Brazil, Peru, and Spain have well-established research programs, partly because ayahuasca is legal or decriminalized in those countries. In the United States, clinical research proceeds under FDA Investigational New Drug (IND) protocols. This is a distinct legal framework from the religious ceremonial use protected under the Religious Freedom Restoration Act (RFRA). These are separate pathways with separate legal foundations. To understand how RFRA protections apply to ceremonial use, see our guide on ayahuasca's legal status in the US.
The growth trajectory is clear: academic interest and publication on ayahuasca has grown steadily since the mid-2000s, tracking the broader resurgence of psychedelic science. This is a fast-moving field — and one still in early stages relative to the depth of indigenous knowledge it is only beginning to approach.
What Has Research Found About Ayahuasca and the Brain?
Some of the most discussed findings in ayahuasca research concern its effects on brain connectivity — specifically on a network called the default mode network (DMN).
The DMN is a set of interconnected brain regions that becomes highly active during self-referential thought: rumination, mental time travel, and the internal narrative we call the "self." Several studies using neuroimaging have found that ayahuasca appears to significantly reduce activity in the DMN during the acute experience. A 2012 study by researchers at Imperial College London, published in PNAS, found that psilocybin — a related compound — reduced DMN activity in ways correlated with measures of ego dissolution. Subsequent ayahuasca-specific research has found broadly similar patterns, though study sizes have been small (typically 12–30 participants).
Researchers have also explored ayahuasca's effects on neuroplasticity — the brain's ability to form and reorganize connections. Preclinical studies in animal models and cell cultures have looked at harmine, one of the beta-carboline compounds in Banisteriopsis caapi. These studies found that harmine promotes the growth of new neurons — called neurogenesis — in the hippocampus, a brain region tied to learning and memory. A 2012 Brazilian study published in PLOS ONE — comparing 127 long-term ritual ayahuasca users in a religious context to 115 non-using controls — found the ayahuasca users performed better on the Wisconsin Card Sorting Test, a standard measure of cognitive flexibility, though the observational nature of that study makes causal conclusions impossible.
What these findings suggest — and it is important to use that word carefully — is that ayahuasca may temporarily alter the brain's default patterns of self-referential processing and potentially promote neural flexibility. These are findings, not facts; correlations, not causes; observations, not prescriptions. The research is pointing toward something important, while also reminding us how much remains unknown.
To understand what the plants themselves bring to the ceremonial brew — Banisteriopsis caapi and chacruna — and the relationship between ayahuasca and DMT, those pages offer deeper exploration of the sacred botany and neurochemistry.
What Do Studies Suggest About Emotional Processing and Well-Being?
Beyond brain imaging, a significant body of research has examined ayahuasca's relationship to emotional processing, mindfulness, and a subjective sense of meaning and connection.
A large survey of ayahuasca users across South America and Europe found that most participants reported positive changes in emotional awareness, relationships, and sense of life purpose in the months following ceremony. Critically, this was an observational study of people who voluntarily used ayahuasca. It cannot establish causation, and self-selection bias is a significant methodological limitation.
Several controlled studies have found that measures of mindfulness — particularly acceptance and present-moment awareness — increase in ceremonial participants compared to control groups. A study published in Psychopharmacology found that a single ayahuasca ceremony produced significant increases in mindfulness-related capacities, including greater acceptance and less self-judgment. Again: small samples, observational designs, and the need for replication.
What participants themselves report is worth noting alongside the clinical measures. Many describe ayahuasca ceremony as among the most profoundly meaningful experiences of their lives — a sense of reconnection to something larger than themselves, a dissolution of long-held emotional patterns, and a deepened relationship to their own inner life. Research instruments can measure some of these dimensions, but they cannot fully capture what ceremony is.
Research on Mood, Anxiety, Trauma, and Substance Dependence
Three application areas have received particular research attention: mood, anxiety, and substance dependence. The findings are promising — and they come with important limitations that any honest account must address.
Mood and Depression
A landmark 2019 randomized controlled trial at Universidade Federal do Rio Grande do Norte in Brazil was the first properly blinded RCT of ayahuasca for depression. It found that a single dose produced rapid, significant reductions in depression scores compared to placebo, with effects apparent within a week. The study enrolled 29 participants with treatment-resistant depression. The effect sizes were large and statistically significant. The study was also small, single-center, and short in duration.
Multiple open-label studies have found similar short-term effects on depression measures. A 2015 open-label study by Osório and colleagues found significant rapid reductions in Hamilton Depression Rating Scale scores following a single dose of ayahuasca administered in a clinical setting. These findings have generated genuine scientific excitement — and appropriately cautious peer commentary about replication, long-term follow-up, and the role of expectation effects.
For a deeper look at what research and participant accounts reveal, see our guide on ayahuasca and depression.
Anxiety
Research on ayahuasca and anxiety is less developed than the depression literature but points in a similar direction. Observational studies of ceremonial populations consistently find lower self-reported anxiety and higher psychological well-being compared to matched controls. The survey mentioned above found anxiety reduction among the most commonly reported positive changes.
One area of particular interest is end-of-life anxiety and existential distress. While most research has focused on psilocybin in this context, ayahuasca's capacity to produce experiences of transcendence and interconnection has led researchers to suggest it may be relevant here as well. Formal studies in this area remain early-stage. For what the research and participant experiences suggest, see our guide on ayahuasca and anxiety.
Trauma and PTSD
Research on ayahuasca and trauma is emerging, with several studies and case reports suggesting that ceremony may support participants in processing traumatic material they have been unable to approach through conventional means. The mechanism hypothesized by researchers involves the combination of ayahuasca's effects on memory reconsolidation, emotional processing, and the sense of a supportive, meaning-laden context that ceremony provides.
This area demands particular care. Trauma is complex, people carrying it are often vulnerable, and ceremonial contexts vary enormously in quality and safety. For a compassionate, evidence-aware guide to this topic, see our page on ayahuasca for trauma.
Substance Dependence
Some of the most intriguing findings in ayahuasca research concern substance dependence. Observational studies have described reductions in alcohol and drug use among participants in traditional ayahuasca ceremonies in the Amazon, though these are small studies that cannot rule out self-selection. A small pilot study of a First Nations community's ayahuasca-assisted program in British Columbia, Canada, published in Current Drug Abuse Reviews, found improvements in measures of substance use and well-being at six-month follow-up among participants who completed the program.
These findings are preliminary, the studies are small, and the populations studied differ significantly from those in most clinical research. But the consistency of participant reports about ayahuasca's capacity to interrupt cycles of use and reconnect people to deeper values makes this a scientifically credible area of inquiry.
How Does Clinical Research Differ from Sacred Ceremony?
This may be the most important question on this page — and the one most commonly overlooked in popular coverage of ayahuasca research.
Clinical research studies are designed to isolate variables. A researcher gives participants a controlled dose of ayahuasca (or a placebo), measures their responses using standardized instruments, and tries to control for expectation, setting, facilitator relationship, and everything else that might explain the outcome. This is good science. It is also a very narrow slice of what ceremony is.
A sacred ayahuasca ceremony includes the medicine — but it also includes the icaros, the healing songs sung by the facilitator across hours of the night. It includes the maloca — the ceremonial space — and the relationships among participants who are sharing a profound and vulnerable experience. It includes days of dieta-informed preparation and the intention the participant brings. It includes the spiritual lineage and relationship of the facilitator with the medicine. It includes integration — what happens in the days and weeks after, when the lessons and insights of ceremony are metabolized and carried into life.
Research protocols capture the pharmacological signal. They cannot capture the spiritual context. Indigenous knowledge holders would say that context is not incidental — it is the point. The Shipibo tradition, from which many ceremonial practices derive, understands the healing songs as the living mechanism of the medicine's guidance. Separating the molecule from its sacred container changes what it is.
To understand what the experience of ceremony actually involves — how it unfolds, what participants report, and what it means to engage it with proper preparation and intention — see our guides on ayahuasca effects and the full ayahuasca journey.
What Does the Research NOT Yet Show?
Intellectual honesty requires equal emphasis on what the research does not yet establish. Addressing this question directly distinguishes responsible information from the exaggerated claims that are increasingly common in popular coverage of psychedelic science.
The ayahuasca research literature has significant limitations:
Sample sizes are small. Most studies enroll 12–30 participants. Effect sizes from small samples are notoriously unstable and may shrink considerably in larger replications.
Most studies are observational. When researchers study people who have voluntarily chosen ceremony, they cannot rule out selection effects — perhaps people drawn to ayahuasca already have certain characteristics, or the act of seeking ceremony signals something important about motivation.
Blinding is difficult. Ayahuasca has powerful subjective effects that make it nearly impossible to run truly double-blind studies. Participants often know whether they received the active compound. This creates expectation effects that are hard to separate from pharmacological ones.
Long-term outcomes are understudied. Most studies measure outcomes at days to weeks post-ceremony. Multi-year follow-up data is sparse, and we do not have good evidence on whether effects persist or how they change over time.
Population heterogeneity is high. The people in these studies differ enormously in background, intention, ceremonial context, and prior experience. Pooling them into a single "ayahuasca group" may obscure important distinctions.
Cultural context variables are rarely measured. What the facilitator brings, the quality of preparation, the ceremonial lineage, the setting, the community — these factors likely influence outcomes enormously, and they are rarely captured in published studies.
None of these limitations invalidate the research. They contextualize it. The science is pointing toward something real and important. It is not yet at the stage where confident clinical recommendations are appropriate — and it is very far from establishing that ceremony is "a treatment" for any condition.
How Are Indigenous Knowledge and Western Science Beginning to Converge?
Perhaps the deepest current of this research moment is the recognition that Western science is not discovering something new — it is beginning to verify what indigenous traditions have known empirically for centuries.
The Shipibo tradition of the Peruvian Amazon has a sophisticated system for understanding how ayahuasca works — one that includes the concept of curanderismo, a relationship with plant teachers that develops through years of disciplined dieta and ceremonial practice. Banisteriopsis caapi is understood not merely as a pharmacological vehicle but as a spiritual teacher with its own intelligence and intentions. The Quechua word "ayahuasca" means "vine of the soul" — this is not metaphor, but a description of the tradition's understanding of what the vine does.
Modern neuroimaging studies that find reduced default mode network activity during ayahuasca ceremonies are measuring something that indigenous traditions have described for generations: a temporary dissolution of the habitual self that allows a deeper seeing. The Western finding adds a neurological vocabulary to what was already known at a different level of analysis.
What is emerging — cautiously — is a conversation across epistemologies. Some researchers are explicitly seeking indigenous collaboration. The Beckley Foundation, working in Peru, has engaged with traditional practitioners. Some indigenous communities are cautiously welcoming the dialogue while also raising concerns about appropriation, exploitation, and the commodification of sacred knowledge.
To understand the deep history of this medicine and the traditions from which ceremonial practices derive, see our pillar page on the history of ayahuasca.
What Does This Mean If You're Considering Ceremony?
If you've arrived at this page through scientific curiosity — if you wanted to understand what the research actually shows before seriously considering ceremony — the most honest summary is this:
The research is genuinely promising. Multiple lines of evidence suggest that ayahuasca, administered in appropriate settings, is associated with positive changes in measures of emotional well-being, psychological flexibility, and even some clinical outcomes. These findings are preliminary and come with significant methodological limitations. They are not a prescription or a guarantee.
They are also not the point of ceremony.
Ceremony at Earth Connection Community is a spiritual practice rooted in sacred indigenous tradition. People come not to receive a pharmacological intervention. They come to engage a sacrament within a carefully held spiritual container — with preparation, intention, experienced facilitators, community support, and integration. The research can validate the scientific curiosity that brings many people to this door. What they find on the other side is something the studies have only begun to approach.
Before considering ceremony, understanding the contraindications and safety considerations is essential — particularly around antidepressants and other medications. Our contraindication screening process is designed to ensure that every person who participates does so safely and with full awareness of the relevant risks.
If you feel called to explore what the science is only beginning to understand, we invite you to learn more about our approach to ceremony or the facilitators who guide it.
Frequently Asked Questions About Ayahuasca Research
Is ayahuasca scientifically proven to work?
No. The research on ayahuasca is promising but preliminary. Multiple studies have found positive changes in measures of mood, emotional processing, and well-being in ceremonial participants, and a small number of controlled trials have found significant effects on depression scores. However, these studies are small, most are observational rather than controlled, and long-term outcome data is limited. The research suggests that ayahuasca has real effects worthy of serious scientific attention — it does not yet support claims of proven efficacy for any condition.
What institutions are leading ayahuasca research?
Key research centers include Imperial College London (UK), the Universidade Federal do Rio Grande do Norte and University of São Paulo (Brazil), the Beckley Foundation (UK), and MAPS (Multidisciplinary Association for Psychedelic Studies, US). Brazilian and Spanish researchers have been particularly prolific, in part because ayahuasca is legal in those countries for religious use.
Does ayahuasca research apply to ceremony?
Research findings from clinical settings may be partially relevant to ceremonial contexts, but they are not directly transferable. Clinical studies control for setting, facilitator relationship, preparation, intention, and community context — all of which are central to ceremony. What research can show is that the pharmacological effects of ayahuasca produce measurable changes in brain activity and psychological measures. What happens in sacred ceremony involves all of that plus much more.
What are the risks that the research documents?
Research also documents that ayahuasca is not without risk. Acute cardiovascular effects (elevated heart rate and blood pressure) occur consistently and can be contraindicated for people with certain heart conditions. Psychological distress during the acute experience — sometimes intense — is commonly reported and can be challenging without proper support. Serotonin syndrome is a serious risk when ayahuasca is combined with SSRIs or other serotonergic medications. Research on longer-term risks, including in vulnerable populations, is limited. Contraindication screening is essential before any ceremonial participation.
How does ayahuasca research relate to the broader psychedelic renaissance?
Ayahuasca research is one part of a broader resurgence of scientific interest in psychedelic substances including psilocybin, MDMA, and ketamine. The FDA granted "Breakthrough Therapy" designation to psilocybin for treatment-resistant depression in 2018 and to MDMA for PTSD in 2017 (since updated). Ayahuasca research is less developed than the psilocybin and MDMA literature but follows similar patterns and is generating similar scientific interest.