Jatobá

What Is Jatobá?

Jatobá is a large tropical tree native to the Amazon Basin, Central America, the Caribbean, and parts of South America. The tree is valued for its dense hardwood, edible fruit pulp, aromatic resin, and medicinal bark.

In Amazonian and Brazilian folk medicine, jatobá bark has traditionally been used as an antimicrobial, antifungal, astringent, and tonic remedy. It is especially associated with urinary tract complaints, prostate inflammation, fungal infections, intestinal parasites, coughs, and chronic inflammatory conditions.

The bark is rich in tannins, flavonoids, resins, and other phenolic compounds, giving it a drying, astringent, and antimicrobial profile.

How Is Jatobá Used?

Jatobá is most commonly prepared as a decoction, tincture, powder, capsule, or resin preparation.

Traditional use focuses primarily on urinary and reproductive complaints such as cystitis, prostatitis, and pelvic inflammation. The bark is also used for fungal infections, Candida overgrowth, intestinal worms, coughs, and general microbial conditions. It’s worth being clear that these traditional urinary and prostate uses are where jatobá’s reputation sits, but not where its evidence sits — the experimental literature has barely tested them (see the research section below).

Because the bark is astringent and resinous, decoctions are commonly used when a stronger traditional preparation is desired. Tinctures and capsules are more common in modern herbal commerce.

Topically, jatobá preparations have been used traditionally for wounds, fungal skin infections, and irritated tissue.

Traditional Uses

Amazonian Herbal Medicine

In Amazonian herbal medicine, jatobá bark is regarded as a strengthening, astringent, and antimicrobial tree medicine.

Traditional indications include cystitis, prostatitis, Candida, fungal infections, respiratory complaints, coughs, hepatitis, stomach complaints, diarrhea, and intestinal parasites.

The bark and resin are both used depending on the region, preparation, and condition.

Brazilian Folk Medicine

In Brazilian folk medicine, jatobá is commonly used for urinary complaints, prostate conditions, respiratory irritation, bronchitis, fungal infections, wounds, and general inflammation.

The fruit pulp is also consumed as food and is considered nourishing, while the bark and resin are used more specifically as medicinal preparations.

Modern Western Herbal Use

Jatobá is less established in formal Western herbal medicine but appears in contemporary Amazonian and rainforest herb traditions as an antimicrobial, antifungal, urinary, and prostate-support herb.

Modern use remains largely based on traditional practice and preliminary pharmacological research rather than standardized clinical trials.

Indications

Jatobá is primarily indicated in traditional medicine for urinary, reproductive, fungal, and microbial conditions.

Common traditional indications include:

• Acute cystitis
• Chronic cystitis
• Acute prostatitis
• Chronic prostatitis
• Fungal infections
• Candida overgrowth
• Intestinal parasites
• Worm infections
• Cough
• Bronchitis
• Skin fungal infections
• Wounds
• Diarrhea
• General inflammatory conditions

Clinically, jatobá is best regarded as a traditional antimicrobial and astringent herb rather than a well-standardized modern botanical medicine.

Botanical Information

Hymenaea courbaril is a large tropical tree belonging to the legume family (Fabaceae). It grows throughout the Amazon, Central America, the Caribbean, and tropical regions of South America.

The tree produces a broad canopy, thick bark, glossy compound leaves, and large woody seed pods containing dry edible pulp. The resin, sometimes called copal, exudes from the trunk and has been used traditionally for incense, varnish, and medicine.

The medicinal portion most commonly used in herbal preparations is the bark, though resin, sap, leaves, and fruit pulp also have traditional uses. Their chemistries are distinct — the bark carries the flavonoids and tannins, the fresh xylem sap concentrates fisetin, the resin and essential oil are terpene-rich, and the seed and fruit coat differ again — which matters when reading the research, because a result in one part does not carry over to another.

Pharmacology & Research

Research on jatobá is small, recent, and almost entirely preclinical: a few dozen papers on Hymenaea courbaril itself, supplemented by studies on close congeners (H. stigonocarpa, H. martiana, H. eriogyne) that share the herb’s characteristic flavonoid, astilbin. The evidence sits at the in-vitro and animal tier — no randomised or human clinical trial of jatobá exists for any indication, and none is registered ^{20Reference 20Coelho Gonçalves CA et al. · 2026ReviewChemical and biological properties of Hymenaea courbaril L.: a reviewView study →}. The most replicated finding is antioxidant/phenolic activity across bark, leaf and seed; the most mechanistically developed are the bark’s astilbin-linked anti-inflammatory and smooth-muscle-relaxant effects ^{1Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →} and the antifungal activity of the fresh xylem sap and its constituent fisetin ^{7Reference 7da Costa MP et al. · 2014In vitroAntifungal and cytotoxicity activities of the fresh xylem sap of Hymenaea courbaril L. and its major constituent fisetin — in vitroView study →}. A recurring caveat runs through all of it: activity is preparation- and plant-part-specific — the antifungal work uses sap not bark decoction, the larvicidal work uses fruit-peel essential oil, and the flagship traditional uses (cystitis, prostatitis) have never been tested directly.

0. Evidence by indication

Support is an experimental score I’m building — a composite weighted by study type (human > animal > in vitro > review) and study volume. It’s a beta: a fast way to rank strength of evidence at a glance, not a validated metric, and I’ll keep honing the formula over time. Each indication name links down to its write-up.

Indication	Support	Rests on
Antioxidant	███████░░░ 68%	Six+ concordant in-vitro assays (DPPH, total phenolics) across bark, leaf and seed; no human data, so capped below the human band.
Antimicrobial	██████░░░░ 62%	Multiple in-vitro studies of bark/seed extracts vs S. aureus (incl. MRSA), P. aeruginosa, biofilm; consistent but cell-free only.
Anti-inflammatory	██████░░░░ 60%	One direct rat study of the bark plus strong congener/astilbin support in mice; animal in vivo, no human data.
Antifungal	█████░░░░░ 54%	In-vitro sap + fisetin vs Cryptococcus/dermatophytes; capped — activity is in the xylem sap, not the bark decoction traditionally used.
Antispasmodic	█████░░░░░ 48%	Single ex-vivo rat-trachea study; astilbin, calcium-channel mechanism mapped; relevant to the bronchitis/asthma tradition.
Antiviral	████░░░░░░ 42%	One in-vitro leaf-extract study against rotavirus; supports the traditional diarrhoea use but unreplicated.
Antidiabetic	████░░░░░░ 40%	Single mouse study, α-amylase inhibition; uses the fruit coat (a flour by-product), not the medicinal bark.
Anticancer	███░░░░░░░ 32%	Cell-line cytotoxicity only (melanoma), seed extract; constituent-level congener data; no in-vivo tumour work.
Antiparasitic	███░░░░░░░ 28%	Fruit-peel essential-oil larvicidal + weak acaricidal/protozoal screens — insecticidal, not the traditional anthelmintic bark use.

1. Antioxidant

This is the herb’s most reproduced activity. Bioassay-guided work on the stem bark found the whole ethanol extract and several fractions strongly scavenged the DPPH radical ^{1Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →}, and independent studies since have reported high total phenolic content and antioxidant capacity in bark, leaf and seed extracts ^{2,4,5,6Reference 2Cruz JERD et al. · 2023In vitroEvaluation of the antioxidant, antimicrobial, and anti-biofilm effects of the stem bark, leaf, and seed extracts from Hymenaea courbaril — in vitroView study →Reference 4Scaramussa SAL et al. · 2024In vitroExtracts from jatobá (Hymenaea courbaril L.) peel and seeds: antioxidant and antimicrobial activity — in vitroView study →Reference 5Spera KD et al. · 2019In vitroGenotoxicity, anti-melanoma and antioxidant activities of Hymenaea courbaril L. seed extract — in vitro, animalView study →Reference 6de Matos JM et al. · 2024In vitroChemical prospection and antioxidant activity of Humiria balsamifera and Hymenaea courbaril L. — in vitroView study →}. The activity tracks the phenolic load — flavonoids such as astilbin and its aglycone taxifolin, plus condensed procyanidins and simple flavan-3-ols like catechin and epicatechin identified by HPLC/UPLC ^{2,3Reference 2Cruz JERD et al. · 2023In vitroEvaluation of the antioxidant, antimicrobial, and anti-biofilm effects of the stem bark, leaf, and seed extracts from Hymenaea courbaril — in vitroView study →Reference 3Gomes LM et al. · 2025In vitroAssessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silicoView study →}. Seed extracts also showed an antigenotoxic (DNA-protective) effect alongside the radical scavenging ^{5Reference 5Spera KD et al. · 2019In vitroGenotoxicity, anti-melanoma and antioxidant activities of Hymenaea courbaril L. seed extract — in vitro, animalView study →}. All measurements are cell-free chemical assays or cell-line work; none establishes an antioxidant effect in a living human.

Gap: No in-vivo antioxidant biomarker study and no human data — the finding is a chemical property of the extract, not a demonstrated clinical effect.

2. Antimicrobial

Bark and seed extracts inhibit a range of bacteria in vitro. A standardised stem-bark extract inhibited a methicillin-resistant Staphylococcus aureus (MRSA) clinical isolate and was rich in catechin and epicatechin ^{3Reference 3Gomes LM et al. · 2025In vitroAssessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silicoView study →}; another bark study found leaf extracts suppressed S. aureus biofilm formation by ~78%, comparable to chloramphenicol in that assay ^{2Reference 2Cruz JERD et al. · 2023In vitroEvaluation of the antioxidant, antimicrobial, and anti-biofilm effects of the stem bark, leaf, and seed extracts from Hymenaea courbaril — in vitroView study →}. Fruit peel-and-seed extracts inhibited P. aeruginosa, Bacillus spp., Enterococcus faecalis and Salmonella, with marked synergy when peel and seed extracts were combined ^{4Reference 4Scaramussa SAL et al. · 2024In vitroExtracts from jatobá (Hymenaea courbaril L.) peel and seeds: antioxidant and antimicrobial activity — in vitroView study →}. Congeneric H. stigonocarpa bark produced similar anti-staphylococcal effects with visible ultrastructural damage to the cell wall, attributed to its tannins and flavonoids ^{18Reference 18Dimech GS et al. · 2013In vitroPhytochemical and antibacterial investigations of the stem bark of Hymenaea stigonocarpa and its effect on Staphylococcus aureus ultrastructure — in vitroView study →}. The activity is consistent but modest (MICs largely in the 64–526 µg/mL range) and entirely in vitro.

Gap: No in-vivo infection model and no clinical work; MIC values are too high to imply systemic antibiotic-level potency.

3. Anti-inflammatory

The direct evidence is one rat study: the stem-bark ethanol extract and its ethyl-acetate fraction reduced ovalbumin-induced leukocytosis and airway hyperresponsiveness, with the isolated flavonoid astilbin implicated in the effect ^{1Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →}. The surrounding genus literature strengthens the mechanism — in H. martiana (“jatobá” in northeastern Brazil), the astilbin-containing bark extract reduced carrageenan paw oedema, peritoneal leukocyte migration and nociception in mice ^{9Reference 9Pacheco AGM et al. · 2021AnimalAntinociceptive and anti-inflammatory activities of Hymenaea martiana Hayne (Fabaceae) in mice — animal modelView study →}, and H. eriogyne bark extract lowered oedema, pro-inflammatory cytokines, MDA and myeloperoxidase in two in-vivo models, with the higher-astilbin bark outperforming the leaf ^{10Reference 10Daniele-Silva A et al. · 2024Anti-inflammatory and antiophidic effects of Hymenaea eriogyne Benth extract and in-silico structure–activity prediction — animal, in silicoView study →}. Astilbin’s parent flavonoid also restored lipid peroxides and tissue prostanoids in a rat hepatotoxicity model ^{11Reference 11Closa D et al. · 1997AnimalProstanoids and free radicals in CCl4-induced hepatotoxicity in rats: effect of astilbin — animal modelView study →}. The through-line is astilbin as a shared anti-inflammatory marker across the genus.

Gap: Only one study uses H. courbaril itself; the strongest in-vivo data are from congeners, and there is no human anti-inflammatory evidence.

4. Antifungal

The best antifungal data come from the fresh xylem sap, not the bark. Filtered H. courbaril sap and its major constituent fisetin inhibited the Cryptococcus neoformans species complex and dermatophytes at MIC <256 µg/mL (sap) and <128 µg/mL (fisetin), with fisetin showing lower toxicity to animal cells than the crude sap ^{7Reference 7da Costa MP et al. · 2014In vitroAntifungal and cytotoxicity activities of the fresh xylem sap of Hymenaea courbaril L. and its major constituent fisetin — in vitroView study →}. Separately, the leaf sesquiterpenoid caryophyllene oxide — the epoxide of β-caryophyllene — was identified decades ago as the compound making the tree’s foliage antifungal and repellent to fungus-growing ants ^{8Reference 8Hubbell SP et al. · 1983In vitroAn antifungal terpenoid defends a neotropical tree (Hymenaea) against attack by fungus-growing ants — in vitro, ecologicalView study →}. Both findings are in vitro / ecological. Crucially, the constituent responsible (sap fisetin, leaf caryophyllene oxide) is concentrated in parts and preparations different from the tannin-rich bark decoction used traditionally for Candida and skin fungus — so the score is capped for preparation mismatch.

Gap: No study tests the bark preparation people actually use against fungi, and there is no clinical antifungal data.

5. Antispasmodic

In the same bioassay-guided bark study, the ethyl-acetate fraction relaxed pre-contracted rat tracheal smooth muscle, and the isolated astilbin reproduced part of that effect ^{1Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →}. Mechanistically, the fraction blunted contractions dependent on calcium entry through voltage- and receptor-operated calcium channels — a plausible basis for the traditional use of jatobá bark in bronchitis, cough and asthma. This is a single ex-vivo study on isolated tissue.

Gap: One study, isolated tissue only; no whole-animal bronchodilation or respiratory-outcome data, let alone human.

6. Antiviral

A screen of Brazilian antidiarrhoeal plants found H. courbaril leaf extract among the strongest in-vitro inhibitors of simian rotavirus SA11, preventing the viral cytopathic effect with no detectable viral genetic material by RT-PCR at non-toxic concentrations ^{12Reference 12Cecílio AB et al. · 2012In vitroScreening of Brazilian medicinal plants for antiviral activity against rotavirus — in vitroView study →}. The authors linked activity to the tannins, flavonoids and coumarins in the leaf. It is a single, unreplicated cell-culture result, but it lends a mechanistic thread to the traditional use of jatobá for diarrhoea.

Gap: One in-vitro study, one virus, leaf not bark; no confirmation in animals or humans.

7. Antidiabetic

Extracts of the jatobá fruit coat — an industrial by-product of jatobá-flour milling — inhibited α-amylase in vitro (IC50 ~51–82 µg/mL, non-competitive) and reduced starch-induced hyperglycaemia when given to mice in a starch-tolerance test ^{13Reference 13Polo AC et al. · 2025In vitroInhibitory effects of aqueous and hydroalcoholic extracts from jatobá coat (Hymenaea courbaril) on α-amylase — in vitro, animalView study →}. In-silico work attributed the effect to procyanidin dimers and rhamnosides of taxifolin and quercetin. This is a genuine in-vivo pharmacological signal, but it uses the fruit coat, not the medicinal bark, so it speaks to the plant’s chemistry more than to the herb as traditionally used.

Gap: Single study, wrong plant part for the herbal preparation, and no glucose-lowering data in a diabetic model or in humans.

8. Anticancer

Evidence is cell-line only. A hydroethanolic H. courbaril seed extract was cytotoxic to B16F10 melanoma cells in a dose- and time-dependent manner while also showing antigenotoxic and antioxidant activity in the same work ^{5Reference 5Spera KD et al. · 2019In vitroGenotoxicity, anti-melanoma and antioxidant activities of Hymenaea courbaril L. seed extract — in vitro, animalView study →}, and a standardised bark extract was profiled for cytotoxicity in RAW 264.7 macrophages during antimicrobial testing ^{3Reference 3Gomes LM et al. · 2025In vitroAssessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silicoView study →}. At the constituent level, dihydroflavonol rhamnosides from the congener H. parvifolia inhibited casein kinase II, a kinase relevant to proliferation ^{19Reference 19Ishibashi M et al. · 1999In vitroCasein kinase II inhibitors isolated from Hymenaea parvifolia and Wulffia baccata — in vitroView study →}. Nothing has progressed to an in-vivo tumour model.

Gap: In-vitro cytotoxicity in one or two cell lines is not evidence of anticancer efficacy; no animal or human oncology data exist.

9. Antiparasitic

The traditional use is for intestinal worms, but the experimental data are insecticidal and protozoal rather than anthelmintic. The essential oils of the fruit peel were larvicidal against Aedes aegypti mosquito larvae — the ripe-peel oil (dominated by α-copaene, spathulenol and β-selinene) was the more potent at LC50 14.8 µg/mL, while the unripe-peel oil (rich in germacrene-D ~32% and β-caryophyllene ~27%) gave LC50 28.4 µg/mL; the diterpene zanzibaric acid was isolated from the ripe peel ^{14Reference 14Aguiar JC et al. · 2010In vitroChemical constituents and larvicidal activity of Hymenaea courbaril fruit peel — in vitroView study →}. Whole-plant extracts showed only weak acaricidal activity against cattle ticks ^{15Reference 15Valente PP et al. · 2014In vitroIn vitro acaricidal efficacy of plant extracts from Brazilian flora against Rhipicephalus microplus — in vitroView study →}, moderate antileishmanial activity in leaf extracts (IC50 ~36–44 µg/mL) ^{16Reference 16Ribeiro TG et al. · 2014In vitroAntileishmanial activity and cytotoxicity of Brazilian plants — in vitroView study →}, and H. courbaril was inactive in an antiplasmodial screen where other species carried the effect ^{17Reference 17Köhler I et al. · 2002In vitroIn vitro antiplasmodial investigation of medicinal plants from El Salvador — in vitroView study →}. None of this tests the herb against the intestinal helminths it is traditionally used for.

Gap: No anthelmintic study of the medicinal preparation; the positive signals are in mosquito larvae and use the fruit-peel oil, a preparation mismatch with a target mismatch.

Mechanisms

Mechanism	Drives	Key compounds
Radical scavenging, high phenolic load	antioxidant, anti-inflammatory	astilbin, taxifolin, catechin, epicatechin
Cytokine / MPO / MDA reduction, leukocyte-migration block	anti-inflammatory	astilbin
Voltage- & receptor-operated Ca²⁺-channel inhibition	antispasmodic (myorelaxant)	astilbin
Membrane / cell-wall disruption, tannin protein-binding	antimicrobial, antifungal	procyanidins, fisetin, catechin
Fungal-membrane / ergosterol interference	antifungal	fisetin, caryophyllene oxide
α-Amylase inhibition (non-competitive)	antidiabetic	procyanidin dimers, taxifolin

Clinical trials

No registered or completed clinical trials of Hymenaea courbaril were identified on ClinicalTrials.gov for any indication — the entire evidence base is preclinical.

Completed	Planned	Terminated	Preclinical
0	0	0	~25–30

Last checked: July 2026.

Phytochemistry

The phytochemistry of Hymenaea courbaril divides between the phenolic fraction of the bark and the terpenoid fraction of the resin and oil. Bioassay-guided study of the stem bark identified the flavanonol astilbin (taxifolin 3-O-rhamnoside) and its aglycone taxifolin as the major phenolics, with astilbin carrying much of the bark’s myorelaxant and anti-inflammatory activity; the related flavonol fisetin is the dominant compound of the fresh xylem sap and the principal antifungal constituent. HPLC/UPLC profiling of the standardised stem-bark extract also identifies the flavan-3-ols catechin and epicatechin as major bark phenolics. Astringent procyanidins (condensed tannins) account for the drying character of bark decoctions, while the aromatic resin and essential oil are rich in the sesquiterpene β-caryophyllene and in labdane-type diterpene resin acids such as zanzibaric acid.

Constituent Summary

Reported from the stem bark, xylem sap, trunk resin and essential oil of Hymenaea courbaril. Most bark and resin constituents have been identified and characterised structurally rather than quantified as a percentage of dry weight, and are given as No Data; the one available figure is for β-caryophyllene as a percentage of the volatile (essential-oil) fraction, which varies markedly with plant part and ripeness — the ~27% figure is for the unripe fruit-peel oil specifically, ripe-peel oil being dominated instead by α-copaene and spathulenol ^{14Reference 14Aguiar JC et al. · 2010In vitroChemical constituents and larvicidal activity of Hymenaea courbaril fruit peel — in vitroView study →}. The middle column gives the constituent type.

Dosage

No clinical trial has established a dose for jatobá: every “dose” in the research literature is an in-vitro concentration or an animal dose, not a human recommendation. The research doses below are given for reference only and are kept separate from the traditional preparations.

Indication	Preparation	Dose	Est. dried-herb equivalent	Source
Antioxidant	Bark ethanol extract / seed extract, DPPH	IC50 in the low-µg/mL range (cell-free assay)	— (in-vitro concentration, not an oral dose)	1,5Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →Reference 5Spera KD et al. · 2019In vitroGenotoxicity, anti-melanoma and antioxidant activities of Hymenaea courbaril L. seed extract — in vitro, animalView study →
Antimicrobial	Bark/seed hydroalcoholic extract	MIC ~64–526 µg/mL (in vitro)	—	2,3,4Reference 2Cruz JERD et al. · 2023In vitroEvaluation of the antioxidant, antimicrobial, and anti-biofilm effects of the stem bark, leaf, and seed extracts from Hymenaea courbaril — in vitroView study →Reference 3Gomes LM et al. · 2025In vitroAssessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silicoView study →Reference 4Scaramussa SAL et al. · 2024In vitroExtracts from jatobá (Hymenaea courbaril L.) peel and seeds: antioxidant and antimicrobial activity — in vitroView study →
Antifungal	Fresh xylem sap / fisetin	MIC <256 µg/mL (sap), <128 µg/mL (fisetin)	—	7Reference 7da Costa MP et al. · 2014In vitroAntifungal and cytotoxicity activities of the fresh xylem sap of Hymenaea courbaril L. and its major constituent fisetin — in vitroView study →
Anti-inflammatory / antispasmodic	Bark ethanol extract & EtOAc fraction	ex-vivo tissue-bath concentrations; congener in-vivo 100–400 mg/kg i.p. (mice)	— (animal i.p. dose; no oral human equivalent)	1,9Reference 1Bezerra GP et al. · 2013In vitroPhytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitroView study →Reference 9Pacheco AGM et al. · 2021AnimalAntinociceptive and anti-inflammatory activities of Hymenaea martiana Hayne (Fabaceae) in mice — animal modelView study →
Antidiabetic	Fruit-coat aqueous/hydroethanolic extract	α-amylase IC50 51–82 µg/mL; oral starch-tolerance in mice	—	13Reference 13Polo AC et al. · 2025In vitroInhibitory effects of aqueous and hydroalcoholic extracts from jatobá coat (Hymenaea courbaril) on α-amylase — in vitro, animalView study →

Est. dried-herb equivalent is left blank throughout: every figure above is an in-vitro MIC/IC50 or an animal i.p. dose with no marker-standardised human preparation to back-convert from, so inventing a dried-herb ratio here would be unfounded. These are a guide to what was tested, not a conversion factor and never a recommendation.

Traditional Dosage

Dosage is not well standardized. The doses below come from Amazonian, Brazilian and Western herbal practice — the whole-herb preparations, which are not interchangeable with the research concentrations above. Because jatobá is tannin-rich and unstandardized, long-term or high-dose internal use should be approached cautiously.

System	Preparation	Dose
Amazonian / Brazilian folk	Bark decoction	1–2 cups daily
Western herbal commerce	Tincture (bark)	2–5 mL, up to 3× daily
Western herbal commerce	Powdered bark / capsules	per product labelling (not standardised)
Topical (folk)	Bark decoction / resin	applied locally as needed

Safety & Contraindications

Jatobá bark is rich in condensed tannins, and like other high-tannin herbs it can cause nausea, constipation or digestive irritation, especially at high doses or with prolonged internal use; chronic or high-dose use of a tannin-rich bark can also reduce the absorption of iron and other minerals. A review of the species reports low acute toxicity in animal assays ^{20Reference 20Coelho Gonçalves CA et al. · 2026ReviewChemical and biological properties of Hymenaea courbaril L.: a reviewView study →}, and a standardised stem-bark extract was non-cytotoxic to macrophage cells in vitro ^{3Reference 3Gomes LM et al. · 2025In vitroAssessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silicoView study →}; however, no repeat-dose or human safety study exists. No drug-interaction, cytochrome-P450, or reproductive-toxicity studies of jatobá have been conducted, so the absence of reported harms reflects absence of investigation rather than established safety. Because the herb is traditionally used for urinary, prostate, fungal and parasitic conditions that can be serious, it should not replace medical assessment for severe, febrile, recurrent or systemically symptomatic infection.

Scope note: no drug-interaction or CYP450 study of jatobá exists — interactions have not been assessed. The only interaction expectation is theoretical: high-tannin herbs can reduce the absorption of iron, other minerals and some alkaloidal drugs taken at the same time, a mechanistic prediction rather than a tested effect. No regulatory or pharmacopoeial monograph (WHO, ESCOP, EMA/HMPC, Commission E) exists for Hymenaea courbaril*, so the herb sits outside the formally-assessed materia medica.*

Pregnancy & lactation

Not specifically researched — avoid. No reproductive or developmental toxicity study of Hymenaea courbaril has been published, and its safety in pregnancy or lactation has not been assessed ^{20Reference 20Coelho Gonçalves CA et al. · 2026ReviewChemical and biological properties of Hymenaea courbaril L.: a reviewView study →}. Traditional Amazonian and Brazilian practice avoids medicinal bark preparations during pregnancy; given the high tannin content and the lack of any safety data, avoidance is the prudent default rather than a conclusion of harm.

Scope note: pregnancy and lactation were not specifically researched — this verdict is precautionary, not a finding of harm.

References

1. Bezerra GP, Góis RW, de Brito TS, et al. (2013). Phytochemical study guided by the myorelaxant activity of the crude extract, fractions and constituent from stem bark of Hymenaea courbaril L. — animal, in vitro. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/23764737/
2. Cruz JERD, Saldanha HC, Nascimento AMD, et al. (2023). Evaluation of the antioxidant, antimicrobial, and anti-biofilm effects of the stem bark, leaf, and seed extracts from Hymenaea courbaril — in vitro. Antibiotics (Basel). https://pubmed.ncbi.nlm.nih.gov/37998803/
3. Gomes LM, Carmo NK, Cordeiro MCC, et al. (2025). Assessment of cytotoxic and antimicrobial activity of Hymenaea courbaril L. stem barks extract — in vitro, in silico. Brazilian Journal of Biology. https://pubmed.ncbi.nlm.nih.gov/41417498/
4. Scaramussa SAL, Soares LA, Santana LCLA (2024). Extracts from jatobá (Hymenaea courbaril L.) peel and seeds: antioxidant and antimicrobial activity — in vitro. Food Science and Technology International. https://pubmed.ncbi.nlm.nih.gov/36330665/
5. Spera KD, Figueiredo PA, Santos PCE, et al. (2019). Genotoxicity, anti-melanoma and antioxidant activities of Hymenaea courbaril L. seed extract — in vitro, animal. Anais da Academia Brasileira de Ciências. https://pubmed.ncbi.nlm.nih.gov/31800695/
6. de Matos JM, Costa ARC, Justino MN, et al. (2024). Chemical prospection and antioxidant activity of Humiria balsamifera and Hymenaea courbaril L. — in vitro. Natural Product Research. https://pubmed.ncbi.nlm.nih.gov/36924455/
7. da Costa MP, Bozinis MC, Andrade WM, et al. (2014). Antifungal and cytotoxicity activities of the fresh xylem sap of Hymenaea courbaril L. and its major constituent fisetin — in vitro. BMC Complementary and Alternative Medicine. https://pubmed.ncbi.nlm.nih.gov/25027026/
8. Hubbell SP, Wiemer DF, Adejare A (1983). An antifungal terpenoid defends a neotropical tree (Hymenaea) against attack by fungus-growing ants — in vitro, ecological. Oecologia. https://pubmed.ncbi.nlm.nih.gov/28310690/
9. Pacheco AGM, Pacheco EJ, Macedo LARO, et al. (2021). Antinociceptive and anti-inflammatory activities of Hymenaea martiana Hayne (Fabaceae) in mice — animal model. Brazilian Journal of Biology. https://pubmed.ncbi.nlm.nih.gov/34105646/
10. Daniele-Silva A, Lucas Tenório CJ, Roberto da Costa Rodrigues J, et al. (2024). Anti-inflammatory and antiophidic effects of Hymenaea eriogyne Benth extract and in-silico structure–activity prediction — animal, in silico. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/39053713/
11. Closa D, Torres M, Hotter G, et al. (1997). Prostanoids and free radicals in CCl4-induced hepatotoxicity in rats: effect of astilbin — animal model. Prostaglandins, Leukotrienes and Essential Fatty Acids. https://pubmed.ncbi.nlm.nih.gov/9150380/
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