Hermetica Superfood Encyclopedia
The Short Answer
Ehretia latifolia bark is presumed to contain tannins, triterpenoids, and phenolic acids — phytochemical classes characteristic of the Ehretia genus — which may exert astringent and anti-inflammatory effects on gastrointestinal mucosa. Clinical evidence is absent, but ethnobotanical records from Samoa document consistent use of its bark decoction as a traditional remedy for stomach complaints, placing it within a pattern of Ehretia species used across the Pacific and Asia for digestive ailments.
CategoryHerb
GroupPacific Islands
Evidence LevelPreliminary
Primary KeywordEhretia latifolia bark benefits
Taupe — botanical close-up
Health Benefits
**Gastrointestinal Support**
Bark decoctions are traditionally used in Samoa to relieve stomach pain and digestive upset; tannins present in related Ehretia species exert astringent effects on inflamed mucosal tissue, potentially reducing irritation.
**Potential Antioxidant Activity**
The closely related Ehretia tinifolia demonstrates measurable antioxidant capacity (DPPH: 303.8 mg EVC/100 g), and phenolic compounds documented in other Ehretia species suggest E. latifolia bark may similarly scavenge reactive oxygen species.
**Anti-inflammatory Properties**
Triterpenoids and flavonoids found in Ehretia genus members inhibit pro-inflammatory cytokine pathways in preclinical models; this mechanism may underlie the traditional use for stomach pain relief.
**Antimicrobial Potential**
Bark extracts from multiple Ehretia species have demonstrated inhibitory activity against gram-positive bacteria and select pathogens in in vitro assays, which may contribute to protective effects on gut microbiota balance.
**Hepatoprotective Activity (Genus-Level Evidence)**
Ehretia anacua and Ehretia acuminata bark and leaf extracts have shown hepatoprotective effects in rodent models via reduction of lipid peroxidation, suggesting possible shared protective phytochemistry across the genus.
**Wound Healing and Mucosal Repair**
Tannin-rich bark preparations in traditional Pacific medicine are applied both internally and topically; tannins facilitate protein cross-linking in wound beds and may support mucosal barrier integrity in the stomach lining.
Origin & History
Natural habitat
Ehretia latifolia is a tropical tree native to Pacific Island regions, including Samoa and neighboring archipelagos, where it grows in lowland forest margins, secondary vegetation, and coastal scrubland. The genus Ehretia belongs to the family Boraginaceae (or Ehretiaceae in some classifications) and comprises roughly 50 species distributed across tropical and subtropical Asia, Africa, and the Pacific. Cultivation is non-commercial; bark is harvested from wild-growing trees by traditional practitioners for local medicinal use.
“Ehretia latifolia holds a place within Samoan traditional healing practice (fa'asāmoa), where bark-derived preparations have been used by community healers (taulasea) to address stomach pain, nausea, and general gastrointestinal discomfort. The Ehretia genus as a whole has a broad cross-cultural medicinal history: in Taiwan, Ehretia acuminata bark tea has been consumed for liver health; in India, Ehretia laevis has been used in Ayurvedic-adjacent folk medicine for fever and gastrointestinal complaints; and in parts of sub-Saharan Africa, Ehretia species bark is employed against dysentery and infections. Pacific Island ethnobotanical surveys, including those compiled through the work of ethnobotanists documenting Polynesian plant knowledge in the late 20th century, consistently identify Ehretia latifolia as a recognized medicinal tree within the Samoan materia medica. The tree's bark, rather than leaves or fruit, is the preferred medicinal part — consistent with the high tannin content typically concentrated in bark tissues across the Boraginaceae family.”Traditional Medicine
Scientific Research
Peer-reviewed pharmacological research specifically on Ehretia latifolia is absent from major indexed databases as of 2024, representing a significant evidence gap for this Pacific Island species. The broader Ehretia genus has generated a modest body of preclinical literature: Ehretia acuminata bark has been investigated for hepatoprotective and anti-inflammatory activity in rodent models, and Ehretia tinifolia fruit has been characterized for antioxidant capacity and fatty acid composition in a Brazilian ethnobotanical context. No human clinical trials, randomized controlled trials, or even formal observational studies have been registered or published for E. latifolia preparations. Evidence for its medicinal use rests entirely on ethnobotanical documentation, primarily from Samoan traditional medicine surveys and Pacific Island plant use compendia.
Preparation & Dosage
Traditional preparation
**Traditional Bark Decoction (Samoan)**
10–20 g) are simmered in water for 15–30 minutes; the resulting liquid is consumed in small quantities (roughly 100–150 mL) for stomach complaints — no standardized dose has been established
Small pieces of dried or fresh bark (approximately .
**Cold Infusion**
Some traditional Pacific practices involve soaking bark in cool water overnight; this method may preferentially extract water-soluble tannins with astringent properties.
**Topical Bark Paste**
Macerated fresh bark may be applied externally for skin conditions in related ethnobotanical traditions, though this is not the primary documented use for E. latifolia.
**Standardization**
No commercial standardized extract exists; no active marker compound has been identified for standardization purposes.
**Dosage Caution**
Without toxicological data or clinical trials, no safe or effective human dose range can be formally recommended; traditional use quantities should be treated as preliminary guidance only.
Nutritional Profile
Detailed nutritional analysis of Ehretia latifolia bark has not been published. Phytochemical screening of related Ehretia species indicates the bark likely contains condensed tannins (proanthocyanidins), hydrolyzable tannins (gallotannins and ellagitannins), phenolic acids, triterpenoid saponins, and flavonoid glycosides — classes consistent with the broader Boraginaceae chemotaxonomy. Ehretia tinifolia fruit seeds contain linoleic acid (54.3%), oleic acid (22.9%), and palmitic acid (12.7%), though bark preparations would not deliver these lipid nutrients. Bark decoctions would primarily deliver water-soluble phenolics; tannin bioavailability from bark preparations is moderate and subject to food matrix effects, gut microbiome transformation, and individual gastric pH variability.
How It Works
Mechanism of Action
Based on phytochemical profiles of closely related Ehretia species, the primary mechanistic candidates in E. latifolia bark include hydrolyzable tannins and condensed proanthocyanidins, which precipitate mucosal proteins and form a protective barrier against irritants, reducing gastric hypersecretion and local inflammation. Phenolic acids such as rosmarinic and chlorogenic acid analogs — documented in Boraginaceae family members — inhibit cyclooxygenase (COX-1/COX-2) enzymes and suppress NF-κB-mediated transcription of inflammatory mediators including IL-6 and TNF-α. Triterpenoid saponins found in Ehretia bark fractions may modulate smooth muscle contractility in the gastrointestinal tract, explaining traditional use for cramping and motility-related discomfort. No direct receptor binding studies or gene expression data have been published for E. latifolia specifically, making these mechanistic attributions extrapolated from genus-level and family-level pharmacological data.
Clinical Evidence
No clinical trials have been conducted on Ehretia latifolia bark preparations in any human population. The medicinal application as a stomach remedy is documented in Samoan ethnobotanical literature, qualifying this ingredient as a traditional use ingredient without clinical validation. Systematic reviews of Pacific Island medicinal plants occasionally reference the Ehretia genus within broader surveys, but none provide quantified clinical outcomes for this species. Confidence in therapeutic benefit for humans remains very low from an evidence-based medicine perspective, though traditional use across generations provides an ethnopharmacological signal warranting future investigation.
Safety & Interactions
No formal toxicological studies, LD50 determinations, or human safety trials have been conducted for Ehretia latifolia bark preparations, making a comprehensive safety profile impossible to establish from published evidence. High-tannin bark decoctions consumed in excessive quantities carry general risks associated with tannin overload, including nausea, constipation, reduced iron absorption through chelation, and potential hepatotoxic effects at very high doses — risks shared across tannin-rich botanical preparations. Drug interactions have not been studied, but tannin-containing preparations are known to bind and reduce absorption of iron supplements, certain antibiotics (particularly tetracyclines and fluoroquinolones), and some alkaloid-based medications. Pregnancy and lactation safety is entirely unestablished; traditional use during pregnancy has not been documented in published ethnobotanical records, and caution is warranted given the absence of safety data.
Synergy Stack
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Also Known As
Ehretia latifoliaTaupePacific EhretiaSamoan bark treeBoraginaceae bark remedy
Frequently Asked Questions
What is taupe (Ehretia latifolia) used for traditionally?
In Samoan traditional medicine, the bark of Ehretia latifolia is decocted in water and consumed to relieve stomach pain and gastrointestinal discomfort. It is used by traditional healers (taulasea) as part of fa'asāmoa healing practice, representing one of several Pacific Island trees employed for digestive complaints. No modern clinical validation of this use has been published.
Is there scientific research on Ehretia latifolia?
Published pharmacological or clinical research specifically on Ehretia latifolia is absent from major indexed databases such as PubMed as of 2024. Related species including Ehretia acuminata and Ehretia tinifolia have been studied for antioxidant, hepatoprotective, and anti-inflammatory properties in preclinical models, providing indirect evidence for the genus. Researchers interested in this species would need to consult ethnobotanical databases and Pacific Island plant surveys for available documentation.
How is Ehretia latifolia bark prepared as a remedy?
The traditional Samoan preparation involves simmering pieces of dried or fresh bark in water to produce a decoction, which is then consumed in small volumes for stomach complaints. Some related Pacific traditions use cold-water soaking of bark overnight as an alternative extraction method. No standardized preparation protocol or validated dosage has been established through clinical research.
Is Ehretia latifolia bark safe to consume?
No formal toxicological studies have been conducted on Ehretia latifolia bark, so a definitive safety profile cannot be provided. High-tannin bark preparations in general can reduce iron absorption, interact with certain antibiotics and medications, and cause gastrointestinal upset if consumed in large quantities. Pregnant and breastfeeding individuals should avoid use given the complete absence of safety data for these populations.
What compounds are found in Ehretia species bark?
Phytochemical studies on related Ehretia species reveal bark typically contains condensed tannins (proanthocyanidins), hydrolyzable tannins, phenolic acids, triterpenoid saponins, and flavonoid glycosides — chemistry consistent with the broader Boraginaceae family. These compounds are associated with astringent, antioxidant, and anti-inflammatory activities in preclinical settings. Specific phytochemical analysis of E. latifolia bark has not been published in peer-reviewed literature.
What is the difference between Ehretia latifolia and other Ehretia species used in supplements?
Ehretia latifolia is primarily used in Samoan traditional medicine for gastrointestinal complaints, while Ehretia tinifolia is more commonly studied for antioxidant properties and has demonstrated measurable DPPH antioxidant capacity (303.8 mg EVC/100 g). Both species contain tannins with astringent effects, but E. latifolia's bark is specifically valued in Pacific Island remedies for stomach pain and digestive upset. The choice between species often depends on regional availability and the specific therapeutic goal.
Are there any known drug interactions with Ehretia latifolia supplements?
While Ehretia latifolia contains tannins that have astringent properties, there is limited clinical research on potential drug interactions with this ingredient. The high tannin content may theoretically affect the absorption of certain medications if taken simultaneously, similar to other tannin-rich botanicals, though specific interaction studies with E. latifolia have not been widely published. It is advisable to consult a healthcare provider before combining E. latifolia supplements with prescription medications, particularly those with narrow therapeutic windows.
Who should avoid taking Ehretia latifolia bark supplements?
Individuals with tannin sensitivity or those prone to constipation should use caution, as the high tannin content in E. latifolia bark can have pronounced astringent effects that may worsen these conditions. Pregnant and nursing women should avoid E. latifolia supplements due to insufficient safety data in these populations. Additionally, those with severe gastrointestinal conditions should consult a healthcare provider before use, as the astringent properties may interact with existing digestive treatments.
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