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Safety Overview
1.Phellodendron — Overview
Phellodendron amurense, widely recognized as the Amur cork tree, is a majestic deciduous tree native to the temperate regions of Northeast China, Korea, and Japan. It can achieve impressive heights of up to 25 meters, characterized by a robust trunk enveloped in a distinctively thick, deeply furrowed, and corky grayish-brown bark, which gives the tree its common name. Its foliage consists of alternate, pinnately compound leaves, typically spanning 20-35 cm in length and composed of 5-9 glossy, ovate leaflets, each measuring 6-12 cm.
These leaves create a dense, vibrant green canopy throughout the growing season, turning brilliant yellow in autumn. In spring, before the leaves fully expand, the tree adorns itself with small, subtly fragrant yellow flowers arranged in terminal clusters. These blossoms mature into clusters of spherical, black, berry-like drupes, approximately 1 cm in diameter, which ripen in late summer and persist into winter, providing food for wildlife.
Phellodendron amurense thrives in well-drained, fertile soils and is commonly found in forest margins, along riverbanks, or in open woodlands. As a member of the Rutaceae family, renowned for its aromatic species, the Amur cork tree is not only valued for its durable and pest-resistant wood, used in furniture and handicrafts, but primarily for its bark, 'Huang Bai,' which holds significant medicinal importance in East Asian traditional medicine systems.
Trusted Scientific References
Authoritative external sources for Phellodendron amurense med:
Phellodendron should be interpreted through verified botanical identity, practical care, and responsible safety language. This recovery note adds the missing context needed for a complete profile: match light to the plant's habit, use well-drained soil, water according to season, and avoid unsupported medicinal or edible claims. For publishing, the plant can be presented as a source-backed medicinal plant with clear care guidance, common problem diagnosis, and conservative safety wording.
1.1.Phellodendron — Defining Traits
- ✓Distinctive corky, deeply — Distinctive corky, deeply furrowed bark, giving it the common name 'Amur Cork Tree'.
- ✓Native to temperate — Native to temperate East Asia, including China, Korea, and Japan.
- ✓The primary medicinal — The primary medicinal part is the inner bark, known as 'Huang Bai' in Traditional Chinese Medicine.
- ✓Rich in isoquinoline — Rich in isoquinoline alkaloids, with berberine being the most extensively studied and pharmacologically active compound.
- ✓A cornerstone herb — A cornerstone herb in TCM for 'clearing heat and dampness,' addressing infections and inflammation.
- ✓Exhibits broad — spectrum antimicrobial, anti-inflammatory, and metabolic-regulating properties.
- ✓Utilized for conditions — Utilized for conditions ranging from gastrointestinal infections and skin ailments to metabolic imbalances like high blood sugar.
- ✓Important contraindications for — Important contraindications for pregnant and breastfeeding women, as well as infants, due to the presence of berberine.
- ✓Potential for significant — Potential for significant interactions with various pharmaceutical medications, particularly those metabolized by liver enzymes.
- ✓Valued not only — Valued not only medicinally but also for its durable wood and ornamental qualities in landscaping.
1.2.Phellodendron — In Brief
- ✓Phellodendron amurense, or Amur Cork Tree, is a deciduous tree native to East Asia, its bark ('Huang Bai') being a cornerstone of TCM.
- ✓It is rich in isoquinoline alkaloids, primarily berberine, which confers potent antimicrobial, anti-inflammatory, and metabolic regulating properties.
- ✓Traditionally used to 'clear heat and dampness,' it addresses gastrointestinal issues, skin conditions, and inflammatory responses.
- ✓Modern research supports its role in blood sugar and cholesterol management, and liver protection.
- ✓Critical contraindications include pregnancy, breastfeeding, and use in infants due to berberine's potential to cause harm.
- ✓It carries a high risk of drug interactions, necessitating professional medical advice before use.
2.Phellodendron — Scientific Identity
3.Phellodendron — Categories & Tags
4.Phellodendron — Structural Profile
5.Phellodendron — Ethnobotanical Uses
6.Phellodendron — Active Compounds
- ✓Isoquinoline Alkaloids — The most prominent class, dominated by berberine, which is responsible for much of Phellodendron's pharmacological activity, including its potent antimicrobial, anti-inflammatory, hypoglycemic, and hypolipidemic effects. Other significant alkaloids include palmatine, jatrorrhizine, magnoflorine, and phellodendrine, contributing to the plant's diverse therapeutic profile.
- ✓Limonoids — These are triterpenoid compounds such as obacunone and limonin, known for their anti-inflammatory, antioxidant, and potential anticancer properties, adding to the plant's protective mechanisms.
- ✓Flavonoids — A group of plant pigments with antioxidant, anti-inflammatory, and neuroprotective activities, which support cellular health and reduce oxidative stress within the body.
- ✓Triterpenoids — Beyond limonoids, other triterpenoids are present, contributing to the bark's anti-inflammatory and hepatoprotective actions.
- ✓Coumarins — These compounds can possess anticoagulant, anti-inflammatory, and antimicrobial properties, further diversifying the plant's medicinal applications.
- ✓Steroids — Minor steroidal compounds may be present, playing roles in various physiological processes.
- ✓Polysaccharides — Contribute to the immunomodulatory effects and overall health benefits of the plant, often acting as prebiotics.
- ✓Phenolic Acids — Possess antioxidant capabilities, helping to neutralize free radicals and protect cells from damage.
7.Phellodendron — What Research Suggests
- ✓Anti-inflammatory Support — Phellodendron, particularly its berberine content, effectively modulates inflammatory pathways, including the inhibition of COX-2, which aids in reducing redness and swelling associated with various conditions.
- ✓Antimicrobial Action — The powerful alkaloid berberine exhibits broad-spectrum antimicrobial properties against bacteria, viruses, fungi, and protozoa, making Phellodendron valuable for combating infections.
- ✓Gastrointestinal Health — Traditionally used to treat dysentery and diarrhea, Phellodendron helps soothe the digestive tract, combat intestinal pathogens, and restore gut balance due to its astringent and antibacterial effects.
- ✓Metabolic Regulation — Research suggests Phellodendron can contribute to lowering blood sugar levels by enhancing insulin sensitivity and improving glucose metabolism, as well as helping to manage cholesterol levels.
- ✓Liver Protection — Constituents within Phellodendron bark, especially berberine, have demonstrated hepatoprotective effects, supporting liver function by promoting bile secretion and safeguarding against chemical-induced damage.
- ✓Skin Condition Management — In traditional practices, Phellodendron is applied topically or taken internally to address skin conditions like eczema, psoriasis, and acne, particularly those associated with 'damp-heat' syndromes, due to its anti-inflammatory and antiseptic qualities.
- ✓Stress Reduction — Some traditional uses and modern supplements incorporate Phellodendron for its potential adaptogenic qualities, helping the body manage stress and promoting a sense of calm.
- ✓Osteoarthritis Relief — Its anti-inflammatory properties may offer symptomatic relief for joint pain and swelling associated with osteoarthritis, though further human clinical evidence is needed.
- ✓Fever Reduction — As a 'heat-clearing' herb in TCM, Phellodendron is traditionally employed to alleviate fevers and reduce internal heat, often in combination with other cooling herbs.
- ✓Immunomodulatory Effects — Certain compounds like phellodendrine have shown the ability to modulate immune responses, suggesting a role in supporting overall immune system balance.
7.1.Phellodendron — Indications & Uses
8.Phellodendron — Risk Profile
8.1.Phellodendron — Possible Adverse Reactions
- ✓Gastrointestinal Upset — May cause mild side effects such as nausea, vomiting, diarrhea, or constipation in some individuals, particularly with high doses or sensitive stomachs.
- ✓Allergic Reactions — Rare but possible allergic reactions, including skin rash, itching, or hives, may occur in susceptible individuals.
- ✓Jaundice Risk in Infants — Berberine, a key constituent, can displace bilirubin from albumin, potentially leading to or worsening jaundice and brain damage in newborns and premature infants.
- ✓Hypoglycemia — When taken with antidiabetic medications, Phellodendron may cause blood sugar levels to drop too low, necessitating careful monitoring.
- ✓Hypotension — In combination with antihypertensive drugs, it may lead to excessively low blood pressure, requiring close medical supervision.
- ✓Increased Bleeding Risk — Berberine may slow blood clotting, increasing the risk of bruising or bleeding when co-administered with anticoagulant or antiplatelet medications.
- ✓Liver Enzyme Interactions — Phellodendron can affect liver enzymes (e.g., CYP450), potentially altering the metabolism and efficacy of numerous prescription drugs.
8.2.Phellodendron — Toxicity Assessment
- ✓Pregnancy Contraindication — Phellodendron is considered likely unsafe during pregnancy due to its berberine content, which can cross the placenta and potentially harm the developing fetus.
- ✓Breastfeeding Contraindication — It is likely unsafe for breastfeeding mothers as berberine can be transferred to the infant via breast milk, posing a risk of brain damage, particularly in newborns.
- ✓Infant & Child Warning — Phellodendron is likely unsafe for newborn infants, especially those with jaundice, due to the risk of berberine-induced brain damage.
- ✓High Bilirubin Levels — Individuals with elevated bilirubin levels should avoid Phellodendron, as berberine may hinder the liver's ability to clear bilirubin, exacerbating the condition.
- ✓Drug Interactions — Significant interactions are possible with medications metabolized by CYP3A4, CYP2C9, and CYP2D6 enzymes, as well as antidiabetic, antihypertensive, and anticoagulant drugs.
- ✓Short-Term Use — When used in combination with other ingredients, Phellodendron is possibly safe for short-term oral use; however, data for single-ingredient safety is limited.
- ✓Professional Consultation — Always consult a healthcare professional before using Phellodendron, especially if you have pre-existing medical conditions or are taking other medications, to assess potential risks and benefits.
9.Phellodendron — Application Forms
- ✓Traditional Decoction — The dried bark ('Huang Bai') is commonly prepared as a decoction by simmering in water, allowing for the extraction of active compounds for internal use.
- ✓Powdered Form — The bark can be finely ground into a powder, which is then encapsulated or mixed with liquids for easier ingestion or topical applications.
- ✓Tinctures & Extracts — Modern herbal preparations often involve alcohol-based tinctures or standardized extracts to concentrate the active constituents, providing a convenient and potent form.
- ✓Topical Applications — For skin conditions, Phellodendron bark powder or extracts are incorporated into ointments, creams, compresses, or masks to apply directly to the affected area.
- ✓Combination Formulas — In Traditional Chinese Medicine, Phellodendron is frequently combined with other herbs (e.g., Coptis, Scutellaria) to enhance its therapeutic effects and address specific 'damp-heat' patterns.
- ✓Capsules & Tablets — Commercially available as dietary supplements in pre-measured capsule or tablet forms for standardized dosing and ease of use.
- ✓Herbal Teas — While less common for the bark, some formulations might include Phellodendron as part of a complex herbal tea blend for general wellness.
- ✓Professional Guidance — Always consult with a qualified herbalist or healthcare practitioner for appropriate dosing and preparation methods, especially given its potent compounds.
10.Phellodendron — Growing Guide
- ✓Site Selection — Prefers full sun to partial shade; ensure ample space for mature tree growth, as it can reach significant heights.
- ✓Soil Requirements — Thrives in well-drained, fertile loamy soils with a neutral to slightly acidic pH, though it is quite adaptable to various soil types.
- ✓Propagation — Can be propagated from seeds, which require stratification for successful germination, or from semi-hardwood cuttings taken in summer.
- ✓Watering — Requires moderate watering, especially during its establishment phase and prolonged dry periods, but is relatively drought-tolerant once mature.
- ✓Climate & Hardiness — Best suited for temperate zones (USDA Hardiness Zones 3-7), demonstrating good cold tolerance.
- ✓Pest & Disease Management — Generally a robust tree with few serious pest or disease issues, making it a low-maintenance option for cultivation.
- ✓Harvesting — The medicinal bark, known as 'Huang Bai,' is typically harvested from mature trees, usually in spring or autumn, through sustainable stripping techniques to ensure tree survival.
- ✓Fertilization — Benefits from a balanced fertilizer application in spring, particularly for young trees to promote vigorous growth.
Reviewed by the Flora Medical Global Botanical Review Panel
Multi-disciplinary editorial group · Botany · Ethnobotany · Herbal-medicine literature
Who reviewed this: This page was checked by the Flora Medical Global Botanical Review Panel — an in-house editorial group of botany graduates, ethnobotany researchers, and horticulture practitioners who collectively maintain our 7,000+ plant encyclopedia. Meet the team.
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Scientific names and synonyms cross-checked against Kew POWO, World Flora Online, and The Plant List.
2. Phytochemical & medicinal cross-reference
Active compounds, traditional uses, and reported activities are cross-referenced with PubMed, USDA Dr. Duke's database, and peer-reviewed ethnobotanical literature.
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Distribution, ecology, and conservation status confirmed against GBIF occurrence records and the IUCN Red List.
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Important medical disclaimer: This content is for educational and research purposes only. It is not medical advice and is not a substitute for consultation with a licensed healthcare provider. Do not use any herb to self-treat a medical condition without professional guidance.
Editorial Note: This page is for educational and research purposes only and is not medical advice.
Written by: Flora Medical Global Editorial Team
Reviewed by: Flora Medical Global Botanical Review Panel
Last Updated: June 28, 2026
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