Most catuaba extract on the market doesn’t have to contain the plant you think you’re buying. No law requires it.
A 2018 Japanese government lab ran DNA tests on catuaba products sold in Japan and the US. Zero of six Japanese products contained either plant genus tied to the catuaba name. Six of seven US products contained a mix of two unrelated genera in the same bottle.
Here’s why. “Catuaba” isn’t a species. It’s a Brazilian trade name stuck onto three unrelated plants from three different families. People take it for libido, mood, and energy. But no single catuaba species has a finished human trial for any of that. Not one.
This guide sorts out which plant does what, what the one real animal study found, and why the dose on your bottle probably means nothing.
What Catuaba Actually Is (Hint: It’s Not One Plant)
Three plants carry the catuaba name in commerce and research. They share a name. Nothing else.
The three species sold as “catuaba”
| Species | Family | Part used | Chemistry | Market status |
|---|---|---|---|---|
| Trichilia catigua | Meliaceae | Stem bark | Polyphenols: cinchonains, procyanidins, epicatechin | Dominant species in commerce |
| Erythroxylum vacciniifolium | Erythroxylaceae | Bark | Tropane alkaloids (“catuabines”) | Rare in authenticated trade |
| Anemopaegma arvense | Bignoniaceae | Root | Triterpenes and leaf flavonoids. No alkaloids | The original 1926 Brazilian Pharmacopoeia catuaba. Now Endangered in Brazil |
One more name sits on most US and European labels, and it isn’t any of the three above, “Erythroxylum catuaba.” It’s invalid. A Brazilian student coined it in 1904 for a plant with compound leaves and no alkaloids, which rules out Erythroxylum on the spot. The name has never had a defined botanical identity.
Watch what regulators do with it. The FDA’s own substance registry maps “Erythroxylum catuaba bark” to a completely different plant, Protium catuaba. Italy and Japan list it as a real Erythroxylum. Germany treats the same name as E. vacciniifolium. Three regulators, three different plants, one invalid label.
Which plant the 2005 depression study actually used
When people cite “the catuaba study,” they mean a 2005 Psychopharmacology paper. It tested Trichilia catigua, not the Erythroxylum name on most Western bottles. More on what it found below.
Why commercial extracts are frequently mislabeled
The DNA numbers above aren’t a one-off. A 2004 market study out of Vienna tested 14 catuaba samples. More than half were adulterated. Tropane alkaloids, the Erythroxylum chemical signature, showed up in half the samples regardless of what the label said (Kletter et al., 2004, PMID 15490329). In the US, 86% of labels in the NIH’s own supplement database don’t name a species at all.
Here’s the part that should bother you most. The one Brazilian sample ever tested and vouchered as E. vacciniifolium turned up cinchonains, the T. catigua chemical fingerprint, instead of the tropane alkaloids its own species is supposed to have. Someone misidentified the plant, or the species chemistry just isn’t consistent. Nobody has sorted out which.
What the Research Actually Shows
The Campos et al. 2005 study, in plain language
Researchers gave mice and rats a hydroalcoholic T. catigua bark extract, then ran the forced swim test, a standard rodent depression model (Campos et al., 2005, PMID 15991001). The extract cut immobility time, the sign of “giving up” in the test.
Haloperidol and chlorpromazine, drugs that block dopamine, reversed the effect. Serotonin blockers didn’t touch it. That points to a dopamine mechanism, not a serotonin one. Rat brain synaptosomes showed more dopamine and serotonin release and less reuptake of both.
It’s a real, mechanistically specific finding, but it’s one animal study. The abstract doesn’t even state the dose.
Where the serotonin and dopamine claims come from
Every “catuaba boosts dopamine” claim you’ll see traces back to this single 2005 paper and two follow-up studies that replicated the antidepressant-like effect in mice using a different extract fraction: Chassot et al., 2011 (PMID 21801825) and Bonassoli et al., 2012 (PMID 22728168). Two independent labs got the same directional result. That’s a real signal in rodents. Nobody has tested it as a mechanism in a person.
What has not been studied in humans
Zero. No completed human trial exists for any single catuaba species, for any use.
One trial tried. NCT02532660, sponsored by a Brazilian manufacturer, tested a T. catigua dry extract at 1,000 mg a day for depression. It enrolled 111 people, then got terminated for recruitment trouble. No results were ever posted.
Every other human data point concerns Catuama, a four-herb liquid that pairs catuaba bark with guarana, so each dose also delivers roughly 40 mg of caffeine. You cannot credit catuaba for anything that product does. Its largest trial, 90 cancer patients treated for radiotherapy fatigue, found no measurable difference from placebo on any primary scale (Cruz et al., 2013). Null.
The 1992 HIV and antimicrobial finding
A 1992 Japanese paper reported that a catuaba extract inhibited HIV-related activity in cells and protected mice against bacterial infection (Manabe et al., In Vivo, 1992, PMID 1525337). It’s cited constantly in marketing copy.
Treat it carefully. The plant was named “Erythroxylum catuaba Arr. Cam.,” an authority and name combination that matches no valid taxonomic record anywhere. Nobody has replicated the result in over thirty years. It’s in-vitro and mouse data on an unidentifiable plant, not evidence for a person with HIV.
Claimed Benefits vs. What’s Actually Supported
| Claim | Evidence level | What the evidence actually shows |
|---|---|---|
| Libido / aphrodisiac | Traditional only | No catuaba species has a rodent sexual-behavior study, let alone a human one. Mendes and Marques’s 2018 book chapter on A. arvense says it outright: no study validates the popular aphrodisiac reputation. Erectile-tissue data is contradictory too: one study found relaxation, another found none using the same rabbit model, and in Catuama the guarana, not the catuaba, drove the effect |
| Mood / antidepressant-like | Animal, replicated in 2 labs | Positive forced-swim results from two independent research groups using different extract fractions. No human trial has finished |
| Anxiety / stress | Animal, contradicted | No anxiolytic effect in normal mice. A separate study found an effect only in mice with induced brain ischemia. One study found no anti-stress effect at all and a rise in adrenal weight at high dose |
| Cognitive support / focus | Animal, contradicted | One study found a memory benefit in healthy mice. Another found zero effect against drug-induced amnesia, using a different extract |
| Energy / stamina | Animal, mostly negative | No change in treadmill exhaustion time or blood lactate at tested doses. The “energy tonic” reputation has direct negative data against it |
| Antimicrobial | In vitro only | Isolated compounds and extracts kill bacteria and fungi in a dish, mostly from one research network. Never tested as an oral antimicrobial in a living body, let alone a person |
Catuaba Dosage
The dose on most labels
Commercial capsules mostly land at 1,000 to 1,800 mg a day of a “4:1” extract. The one registered human trial used 1,000 mg a day of a T. catigua dry extract. That’s the only dose with any trial attached to it, and that trial produced zero results.
Why there’s no clinically established dose
Because nobody has run the study that would establish one. There’s no human pharmacokinetic data for any catuaba species, no dose-ranging trial, nothing.
The ratio claims on bottles don’t help either. Documented lab extractions of T. catigua bark produce a crude extract ratio of roughly 4:1 to 10:1. Only a purified fraction, not a whole extract, reaches 20:1 or higher. A bottle advertising “200:1” at the same price as a “4:1” extract is not describing a true concentrate of bark. It’s describing a marketing number.
Powder, capsule, or tincture: what changes
The solvent changes which compounds you get, not just how much. In one comparison, procyanidin B2, one of the bark’s more studied antioxidants, showed up only in a 50% ethanol extract. Water, chloroform, and hexane extracts of the same bark didn’t contain it. Cinchonains, by contrast, extracted across nearly every solvent tested. Two extracts labeled identically on a bottle can carry different chemistry underneath.
Side Effects and Safety
What’s on record
Labels and older herbal references list upset stomach, headache, dizziness, and sweating at high intake. The FDA’s adverse-event database holds exactly three reports naming catuaba, species unspecified. One, filed in 2022, names catuaba as the sole suspect for increased erection, heart palpitations, and a panic attack in a 31-year-old man. Causality was never assessed.
Animal data adds two findings. Pregnant rats given 400 mg/kg of a T. catigua crude extract showed increased pre- and post-implantation loss (dos Santos et al., 2015, PMID 25792016). And in a separate mouse study, repeated high doses of a T. catigua extract fraction caused deaths, a result that directly contradicted the same paper’s own stated safe-dose estimate (Chang et al., 2022).
Who should avoid it
Pregnant or breastfeeding people, full stop. There is no human safety data for any catuaba species in pregnancy, and the one rat signal above points the wrong way. The sole human trial excluded pregnant participants entirely.
Drug interactions
None are confirmed. That’s not the same as “none exist.” Zero studies have tested catuaba against liver enzymes (CYP) or drug transporters in any species, human or animal. Untested is not safe. It just means nobody has looked yet.
Catuaba vs. Muira Puama
Catuaba gets paired constantly with muira puama (Ptychopetalum olacoides), another Brazilian herb sold for the same traditional use. They’re unrelated plants from different families, usually sold in the same blends, next to the same caffeine-heavy guarana.
| Category | Catuaba (T. catigua) | Muira puama (P. olacoides) |
|---|---|---|
| Traditional use | Aphrodisiac, nerve tonic | Aphrodisiac, nerve tonic |
| Completed human trial, single herb | None | None |
| Strongest evidence | Animal antidepressant-like effect | Mostly traditional and anecdotal |
| Common blend partner | Guarana, muira puama | Guarana, catuaba |
Neither herb has cleared the bar of a finished human trial on its own. If a product blends them with guarana, you’re also getting caffeine, and caffeine alone will do a lot of the “energizing” work people report.
How to Choose a Catuaba Extract
Check the species on the label
Look for Trichilia catigua by name. It’s the species with actual animal pharmacology behind it. Walk away from anything listing only “Erythroxylum catuaba.” That name has no fixed identity, and it means three different plants depending on which country wrote the label.
Standardization means nothing without a marker
A “4:1” or “10:1” ratio tells you nothing on its own. Ask what compound it’s standardized to. Cinchonain Ib, procyanidin B2, and epicatechin are the only markers with any validated test method behind them for T. catigua. “Standardized polyphenols” with no named compound is not standardization. It’s a word on a label.
Red flags worth walking away from
- A proprietary blend that hides the species or the ratio
- No certificate of analysis available on request
- A “% extract” or “% polyphenols” claim with no analyte named
- Extraction ratios above 10:1 priced the same as basic bark powder
FAQ
Does catuaba work?
Depends which plant and for what. T. catigua has a real, replicated antidepressant-like effect in rodents. For libido specifically, the evidence is traditional reputation only, nothing clinical.
Is catuaba safe to take daily?
Unassessed long-term. Short, high-dose animal studies show some warning signs. No human safety trial beyond one 28-day study of a different, caffeine-containing product exists.
How long does it take to feel effects?
Nobody knows. No human pharmacokinetic study of any catuaba species has ever been run, so no onset timeline can honestly be given.
Can you take catuaba with other supplements or nootropics?
No interaction studies exist for any combination. Be cautious stacking it with stimulants. Many catuaba products are already blended with guarana, which adds caffeine on top of whatever catuaba itself does.
What’s the difference between catuaba and catuaba bark extract?
“Catuaba” alone doesn’t specify a species or a plant part. Bark is the traditional part for both T. catigua and E. vacciniifolium. The original 1926 pharmacopoeia version, A. arvense, used the root instead.
The species confusion isn’t a technicality. It’s the whole story. Pick the plant by its scientific name, not the word on the front of the bottle, and you’ll already know more than most of what’s for sale.