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The Many Benefits of Coca - The "Divine Leaf" with 8,000+ Years of Use

2026-06-25 - source - Read full transcript

Tim Ferriss (host)Andrew WeilWade Davis

Key insights

Coca leaf contains 14 alkaloids, of which cocaine is only one, and none of the others have ever been studied.

Weil argues that once cocaine was isolated from the leaf, scientific interest in the plant's other compounds evaporated. He believes the full complex of alkaloids acting together, not cocaine alone, produces the mental and physical benefits users report, and that this is a model for how whole-plant medicine differs from isolated pharmaceuticals.

whole-plant-vs-isolated-compound

Coca appears to have a paradoxical, self-regulating effect on gut motility, treating both diarrhea and constipation.

Cocaine alone is a gut stimulant, which should worsen diarrhea, yet Andean users report relief from both conditions. Weil hypothesizes that other coca alkaloids structurally resemble gut paralytics like atropine and scopolamine, and that the body selectively engages whichever effect matches its current state rather than being pushed in only one direction.

whole-plant-vs-isolated-compound

A small, decades-old study found coca chewing normalized blood sugar in Andean subjects during a glucose-tolerance test on exercise bikes.

Andean populations carry high genetic risk for type 2 diabetes but have low rates of it while on traditional diets with coca use; rates rise sharply when they move to lower altitude and stop chewing coca. Weil calls this a significant, essentially unstudied lead on coca's potential to regulate carbohydrate metabolism.

whole-plant-vs-isolated-compound

Coca's subjective stimulant effect is much milder than coffee and, unlike caffeine or modafinil, produces no crash, tolerance, or withdrawal for either speaker.

Ferriss compares his experience with coca leaf tea and mambe favorably against modafinil and amphetamines: no post-use crash, no felt need to redose to return to baseline. Weil and Davis describe it as sustained focus and mood elevation without a felt sense of being 'under the influence.'

coca-vs-cocaine-subjective-effects

Coca eradication campaigns in the Andes began roughly 60 years before cocaine became a public health problem, targeting Indigenous cultural identity rather than pharmacology.

Davis says the drive to eradicate coca originated with Lima's European-descended elite, who saw coca-chewing as a marker of an Indigenous underclass they associated with poverty and illiteracy, and used that association (rather than any drug-safety finding) to justify suppression.

coca-drug-policy-history

The 1949-50 UN commission that recommended coca eradication announced its conclusion before its investigators left New York and never interviewed a traditional coca user.

Led by pharmaceutical executive Howard Fonda, the commission spent three months meeting only with military officials, mayors, government officials, and priests in the southern Andes. Davis characterizes the report's language as openly racist, and notes it became foundational to the 1961 UN Convention on Narcotic Drugs still in force today.

coca-drug-policy-history

The intellectual architect of coca's international demonization was WHO official Pablo Osvaldo Wolff, whose 1949 writings described coca users in explicitly dehumanizing, racist terms.

Davis reads Wolff's language at length on the episode: describing chewers as 'morally and intellectually anesthetized' and blaming coca for 'the backwardness and misery of the Indian population.' That same language underlies statutes the world still lives under, and the WHO recently reaffirmed coca's Schedule I status against advocacy to reclassify it.

coca-drug-policy-history

Coca leaf tea's altitude-sickness benefit is well established in Andean practice and has real-world legal consequences for athletes.

Ferriss describes his own rapid recovery from altitude sickness in Chile after drinking coca tea. Davis recounts successfully defending a Peruvian national soccer captain who tested positive for trace cocaine metabolites after drinking coca tea at an Cusco hotel, averting a doping scandal by explaining the plant-versus-drug distinction to Brazilian authorities.

coca-vs-cocaine-subjective-effects

Coca-Cola holds a unique legal exception allowing it to import coca leaf, via a New Jersey chemical company that extracts the cocaine and returns de-cocainized leaf extract as a secret flavoring.

Stepan Chemical in Maywood, New Jersey is, per the speakers, the only entity with US and UN permission to import coca leaf; the cocaine it extracts goes to pharmaceutical uses (e.g., ophthalmology) while the residual leaf extract flavors Coca-Cola. The 1961 UN Convention carved out this specific exclusion for the company.

coca-commercialization-and-research-path

Coca was independently domesticated three separate times in pre-Columbian history from a single wild ancestor species.

DNA analysis traces all four cultivated coca varieties back to wild Erythroxylum gracilipes. Davis says the plant was domesticated separately in the Montaña of Colombia, the Yungas of Bolivia/Peru, and the Northwest Amazon, an extremely rare occurrence in plant domestication history, and in each case became the region's most sacred plant.

indigenous-cultural-significance

In several Andean cultures, coca is inseparable from identity and social contract; denying it is described as a form of cultural erasure.

Davis cites anthropologist Catherine Allen's framing that denying Andean people coca is not like denying Germans beer, but closer to cultural genocide, since full participation in Andean identity ('runakuna') requires proper coca use. Rituals like the k'intu, cruceta, and the mojonamiento endurance run all use coca as the medium of obligation to land and community.

indigenous-cultural-significance

Weil and Davis lay out a three-pronged path to rehabilitating coca: build consumer demand through education, fund FDA-relevant research on specific therapeutic uses, and reframe the cultural story through media.

Weil emphasizes creating North American consumer demand and pursuing FDA-recognized therapeutic applications (GI disorders, ADHD, substance-abuse treatment, metabolic/diabetes indications) since coca is already Schedule II domestically. Davis adds that storytelling, including their in-progress documentary, is needed to counter decades of demonization and highlights the economic stakes for the roughly 250,000 Colombian families who grow coca.

coca-commercialization-and-research-path

Books referenced

One River - Wade Davis - Davis's biography of his mentor Richard Evan Schultes, written partly in memory of Tim Plowman, the botanist who first studied coca's nutritional profile; both hosts recommend it as the deepest account of coca's history.

Media referenced

The Secret History of Coca - article - Wade Davis's Rolling Stone piece documenting the racist language used by the officials who wrote the international drug-policy statutes that still govern coca today.
Untitled coca documentary (in production) - movie - Weil and Davis are raising funds for a film to reframe coca's cultural narrative as a story of social justice, spiritual significance, and Andean pre-history.
Eater article on Stepan Chemical - article - Ferriss reads from a piece describing how a New Jersey chemical company legally imports coca leaf to extract cocaine for pharmaceutical use and flavor Coca-Cola with the de-cocainized extract.
Reefer Madness - movie - Cited as a product of Harry Anslinger's anti-drug propaganda apparatus, the same lineage that produced the racist coca-eradication language of the 1940s-50s.

Companies

Coca-Cola - Holds a unique carve-out in the 1961 UN Convention on Narcotic Drugs allowing it to import coca leaf; its cocaine-free leaf extract is a secret flavoring ingredient.
Stepan Chemical (Maywood, New Jersey) - The only company with US government permission to legally import coca leaf from Peru, extract cocaine for pharmaceutical use, and supply de-cocainized extract to Coca-Cola.
Beneficial Plant Research Association (bpra.org) - Nonprofit Weil founded in the 1970s and revived in recent years to fund research and public education on coca and other under-studied medicinal plants.
Andrew Weil University of Arizona Center for Integrative Medicine (awcim.org) - Weil's physician-training program; nearly 3,000 graduates, with instruction in botanical medicine.
National Institute on Drug Abuse (NIDA) - Federal agency willing to fund rigorous coca studies, per Weil, citing researcher Chris McCurdy's funded work.
True Food Kitchen / Matcha Kari - Referenced as an example of the kind of consumer brand that could commercialize coca the way it did matcha.

Techniques and frameworks

K'intu - Andean offering ritual: three perfect coca leaves fanned together, blown on, and whispered prayers over.
Cruceta - A small cross made of three coca leaves, lifted toward a sacred mountain when travelers meet on a trail, used to send the leaf's energy to the mountain.
Mambe - Amazonian coca preparation: leaves ground into a green powder and swallowed whole with an ash admixture, rather than chewed with an alkali.
Mojonamiento - A 24-hour ritual endurance run near Cusco, sustained by heavy coca use, that marks a young man's coming of age and expresses obligation to the land.

Summary

Tim Ferriss hosts physician-ethnobotanist Dr. Andrew Weil and anthropologist-author Wade Davis, two of the world's foremost authorities on coca, for a wide-ranging case for rehabilitating the plant's reputation. Weil, who first encountered coca in Peru in 1965 under the mentorship of Harvard botanist Richard Evan Schultes, opens by distinguishing coca from cocaine: the leaf contains fourteen alkaloids, of which cocaine is just one, and the whole-plant complex produces effects, aiding digestion, moderating blood sugar, easing altitude sickness, lifting mood, that isolated cocaine does not. Davis, also a Schultes protege and author of the Schultes biography "One River," extends the argument into policy and culture, describing coca as a plant domesticated three separate times in pre-Columbian history and revered as sacred across every Andean and Amazonian culture that has used it for roughly 8,000 years.

The conversation's spine is a history of coca's demonization that both men frame as a story about power and race rather than pharmacology. Davis traces the campaign to eradicate coca back some 60 years before cocaine became a public health issue, to Lima's European-descended elite, who used coca-chewing as a proxy for the Indigenous poverty and "backwardness" they wanted to disown. He reads at length from a 1949 lecture by WHO official Pablo Osvaldo Wolff, whose openly racist characterization of coca chewers became the intellectual scaffolding for the 1961 UN Convention on Narcotic Drugs, the same convention that still classifies coca leaf alongside fentanyl and heroin, and that the WHO recently reaffirmed despite advocacy to reschedule it. Both men note the irony that Coca-Cola holds a unique carve-out in that same convention, importing coca leaf through a New Jersey chemical company (Stepan Chemical) that extracts the cocaine for pharmaceutical use and returns a cocaine-free leaf extract as a secret flavoring.

Much of the episode explores coca's role in Andean and Amazonian ritual life: the k'intu offering of three fanned leaves, the cruceta cross lifted toward sacred mountains, the mambe preparation used in the Northwest Amazon, and the mojonamiento, a grueling 24-hour ritual run near Cusco that Davis completed at age 48 fueled by heavy coca chewing. Both speakers describe coca's subjective effect as far milder than coffee, without the crash, tolerance, or withdrawal they associate with caffeine, modafinil, or amphetamines, and Weil credits regular coca use as a contributor to his health at 84. They also flag concrete evidence gaps: a small, decades-old study suggesting coca chewing normalizes blood sugar during exercise in Andean subjects, and Weil's puzzling observation that coca seems to treat both diarrhea and constipation, which he attributes to other alkaloids acting as gut paralytics that offset cocaine's stimulant effect on the gut.

The back half turns practical. Weil and Davis lay out a three-part plan to rehabilitate coca: build North American consumer demand through education, fund research (via scientists like University of Florida pharmacologist Chris McCurdy, whose NIDA-backed coca study only recently cleared years of regulatory hurdles) toward FDA-recognized uses for GI disorders, ADHD, metabolic disease, and substance-abuse treatment, and use storytelling, including a documentary the two are raising funds for, to reframe coca's cultural narrative. They stress the economic stakes for roughly 250,000 Colombian families who grow coca and argue that a licit commercial market, not crop substitution, is the realistic path to reducing both deforestation and dependence on cartels. The episode closes with Davis's blunt framing that coca is "to cocaine what potatoes are to vodka," and both guests point listeners to Weil's Beneficial Plant Research Association (bpra.org) as the current hub for funding coca research and their forthcoming film.

Notable Quotes

"Coca is to cocaine what potatoes are to vodka." - Wade Davis

"This whole complex of compounds acting together is responsible for the effects that people report as being very beneficial, both for mental health and physical health." - Andrew Weil

"It's Latin America's greatest gift to the world and it's one that's been denied in a way that's been incredibly unproductive." - Wade Davis

"I would like to surface subjects that are of importance that have not yet been reputationally de-risked... I have the incredible accidental luxury of being able to have these conversations." - Tim Ferriss

"This wasn't just an accident of history or casual neglect. This was a conscious attempt to demonize and eradicate a plant... for cultural and political and reasons of power." - Wade Davis