DMT (N,N-dimethyltryptamine) comes from a surprisingly wide range of sources. It’s found in dozens of plant species across multiple continents, produced naturally in the brains of mammals including humans, and present in certain fungi, marine sponges, and even frogs. Few psychoactive compounds are this widespread in nature, which is part of what makes DMT so unusual.
Plant Sources With the Highest Concentrations
The richest natural source of DMT is the root bark of Mimosa tenuiflora, a tree native to northeastern Brazil. Its root bark contains between 0.5% and 1.7% DMT by dry weight, with some analyses finding concentrations near 2%. The stem bark is less potent, typically around 0.3%. This plant has become one of the most commonly referenced botanical sources for DMT extraction.
Psychotria viridis, a shrub native to the Amazon basin, is the other major plant source. Its leaves contain 0.1% to 0.66% DMT by dry weight, with the concentration varying based on the individual plant and even the time of day the leaves are harvested. Psychotria viridis is the DMT-containing ingredient in ayahuasca, the ceremonial brew used by Indigenous peoples across South America for centuries.
Beyond these two, DMT appears across a broad range of plant families. Various species of Acacia, Desmodium, and Virola contain DMT in their bark, leaves, or seeds. Grasses in the Phalaris genus also contain trace amounts. The compound is remarkably common in the plant kingdom, appearing in legumes, grasses, and woody trees on nearly every continent.
Anadenanthera and Related Snuffs
The seeds of Anadenanthera peregrina, used by Indigenous Orinocoan peoples to make a hallucinogenic snuff called yopo, are sometimes grouped with DMT-containing plants. However, the primary active compound in yopo is actually bufotenine (a close chemical cousin of DMT, with an extra oxygen atom), not DMT itself. The distinction matters because bufotenine and DMT have different effects and potencies, though they share a similar molecular backbone.
How Ayahuasca Combines Two Plants
DMT on its own is inactive when swallowed. An enzyme in your gut called monoamine oxidase (MAO) breaks it down before it can reach your bloodstream. This is why ayahuasca requires two ingredients: a DMT source (usually Psychotria viridis leaves) and a MAO-inhibiting plant (usually the Banisteriopsis caapi vine). The vine contains compounds called harmine, harmaline, and tetrahydroharmine that temporarily block the gut enzyme, allowing DMT to pass into the blood and eventually the brain.
Chemical analysis of six ayahuasca samples found an average DMT concentration of about 1.13 mg per gram of brew, with individual samples ranging from 0.53 to 1.86 mg/g. The harmine content was higher, averaging 2.83 mg/g. This balance between the DMT and the enzyme-blocking compounds is what makes the brew orally active, and different preparation methods produce significantly different potencies.
DMT in the Human Body
Your body produces DMT naturally. The compound has been detected in human blood, urine, and cerebrospinal fluid (the liquid surrounding the brain and spinal cord). A 2012 review assessed 69 studies spanning over five decades that confirmed endogenous DMT in healthy human subjects, not just in people with psychiatric conditions. Blood concentrations ranged from as low as 51 picograms per milliliter to as high as 55 nanograms per milliliter, depending on the detection method used. Urine concentrations ranged from 0.16 to 19 ng/ml.
The biosynthesis pathway is straightforward. Your body starts with tryptophan, a common amino acid found in protein-rich foods. An enzyme converts tryptophan into tryptamine, and then a second enzyme called INMT (indolethylamine-N-methyltransferase) adds two methyl groups to produce DMT. This is the same basic pathway that operates in plants and other animals.
The amounts are tiny compared to what would produce psychoactive effects. But the fact that it’s there at all, produced by a dedicated enzymatic pathway, raises the question of what it’s doing.
The Pineal Gland Theory
A popular claim, largely stemming from Rick Strassman’s 2001 book “DMT: The Spirit Molecule,” proposes that the pineal gland floods the brain with DMT during near-death experiences and dreaming. The scientific picture is more nuanced.
Researchers have confirmed that INMT (the enzyme needed to make DMT) is expressed in several regions of the rat and human brain, including the cerebral cortex, the choroid plexus, and yes, the pineal gland. A 2019 study published in Scientific Reports went further, showing that in rat brains, the two enzymes needed for DMT production are present in the same individual neurons, spread widely across the cortex. This suggests DMT synthesis isn’t limited to the pineal gland at all. It may happen throughout the brain.
The same study found that rat brains can produce and release DMT at concentrations comparable to established neurotransmitters like serotonin. That’s a significant finding. But whether DMT actually functions as a neurotransmitter, and what role it plays in consciousness, remains speculative. The pineal gland likely contributes to DMT production, but it’s not the sole source, and the idea of a massive DMT release at death has not been demonstrated in humans.
DMT in Other Animals
DMT isn’t exclusive to humans and plants. It has been identified in other mammals, marine sponges, tunicates (sea squirts), and certain frog species. The enzymatic machinery for producing DMT, specifically the combination of AADC and INMT, has been found in rat brain tissue across multiple regions. The widespread distribution of these enzymes in mammalian brains suggests DMT production is an ancient and conserved biological process, not a quirk of a few exotic species.
Synthetic DMT
DMT can also be synthesized in a laboratory. The molecule is relatively simple: a tryptamine backbone with two methyl groups attached to the nitrogen. Lab synthesis typically starts with indole (a common organic compound) or tryptamine and uses chemical methylation to attach those methyl groups. The result is chemically identical to the DMT found in plants or the human body. Most DMT encountered outside of traditional ayahuasca ceremonies is either extracted from plant material or synthesized, and the two are indistinguishable at the molecular level.