Terminalia arjuna (Combretaceae) Arjuna - 'Heart healer'

Das K
Jan 10
13 min read

Updated: Jun 4

Terminalia arjuna is a premier cardioprotective and cardiotonic herb, revered in Ayurveda as the most significant rejuvenative for the heart. Its bark is most notably used to strengthen cardiac muscle, manage angina pectoris, improve exercise tolerance, and treat hypertension and hyperlipidemia. Modern research has validated its profound antioxidant, anti-inflammatory, and hypolipidemic properties, with a standardized extract recently demonstrating potent thrombin and ACE inhibition alongside cellular cardioprotection.

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1. Taxonomic Insights

Species: Terminalia arjuna (Roxb. ex DC.) Wight & Arn.

Family: Combretaceae

Taxonomic Note: The genus name Terminalia refers to the arrangement of leaves at the terminal ends of the branches. The species epithet arjuna, meaning "bright" or "white" in Sanskrit, refers to the characteristic pale or whitish color of the mature bark.

The Combretaceae family consists of approximately 20 genera and 600 species of trees and shrubs, primarily tropical. It is characterized by the presence of diverse bioactive compounds including triterpenoids, flavonoids, and tannins, making the family medicinally significant for cardiovascular, hepatoprotective, and antimicrobial applications.

Related Herbs from the Same Family:

· Terminalia chebula (Haritaki): The "King of Medicines" in Ayurveda, a prime rejuvenative and digestive tonic used for detoxification and gastrointestinal health.

· Terminalia bellirica (Bibhitaki): A key component of Triphala, used primarily for respiratory and digestive cleansing.

· Terminalia arjuna is distinct among its relatives for its specific and potent cardiotonic actions, while the other Terminalia species are more focused on digestive and rejuvenative functions.

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2. Common Names

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3. Medicinal Uses

Primary Actions: Cardiotonic, Cardioprotective, Anti-ischemic, Antihypertensive, Hypolipidemic, Antioxidant, Anti-inflammatory.

Secondary Actions: Antianginal, Antithrombotic (antiplatelet, anticoagulant), Diuretic, Astringent, Hepatoprotective, Antidiabetic, Antimicrobial, Anticancer, Adaptogenic.

Medicinal Parts:

The stem bark is the primary and most extensively studied medicinal part, though leaves, fruits, and roots also possess therapeutic properties.

· Stem Bark (The Premier Part): The source of the majority of bioactive compounds including arjunolic acid, arjunic acid, arjunetin, and a wealth of flavonoids and tannins.

· Leaves: Used in traditional preparations with some antioxidant and antimicrobial properties.

· Fruits: Possess astringent and potential hypolipidemic actions.

· Leaf Galls: Formed by insect (Trioza fletcheri) attacks, these galls contain high levels of 5-hydroxymethylfurfural which has demonstrated significant anti-sickling properties for sickle cell anaemia.

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4. Phytochemicals Specific to the Plant and Their Action

Triterpenoids (The Signature Cardioprotective Class):

· Arjunolic Acid: The major and most studied pentacyclic triterpenoid. It exhibits potent Cardioprotective, Anti-ischemic, Antioxidant, Anti-inflammatory, Anti-diabetic, and Hepatoprotective activities. It is the focus of research for developing new drug leads.

· Arjunic Acid: A key triterpenoid contributing to Antioxidant and Cytotoxic properties.

· Arjunetin: Demonstrates Antioxidant and Antiviral activities.

· Arjungenin: Exhibits Cytotoxic properties.

· Other Triterpenoids: Terminic acid, arjunolitin, terminoic acid, arjunic acid, and numerous glycosides (arjunosides I-V, terminarjunosides I-II).

Flavonoids:

· Luteolin, Quercetin, Kaempferol, Baicalein, Apigenin, (+)-catechin, (−)-epicatechin, (−)-epigallocatechin: These compounds provide potent Antioxidant and Anti-inflammatory effects. They contribute to Cardiovascular benefits by improving endothelial function, reducing oxidative stress, and inhibiting platelet aggregation.

Tannins and Phenolic Acids:

· Gallic Acid, Ellagic Acid, Pyrocatechol, Punicalagin, Castalagin, Casuariin, Casuarinin, Terchebulin, Terflavin C: These high molecular weight polyphenols are powerful Antioxidants that protect cells from oxidative damage and contribute to Astringent, Wound-healing, and Antimicrobial activities. They are responsible for the bark's characteristic astringency.

· Oligomeric Proanthocyanidins (OPCs): These are also present and contribute to the cardiovascular and antioxidant profile.

Other Bioactive Compounds:

· β-Sitosterol: A phytosterol with Anti-inflammatory and Cholesterol-lowering properties.

· Arjunolone: A unique flavone found in the bark.

· 5-Hydroxymethylfurfural (5-HMF): Found in leaf galls, this compound has demonstrated significant Anti-sickling properties in sickle cell anaemia research.

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5. Traditional and Ethnobotanical Uses Covering the Medicinal Uses

Hridroga (Cardiovascular Diseases, Angina, Heart Failure)

Formulation: Bark powder or decoction (Kwath) with milk or water.

Preparation & Use: In Ayurveda, Arjuna bark is the foremost remedy for all heart conditions. A typical dose is 3-6 grams of fine bark powder taken with warm milk or a decoction prepared by simmering the bark in milk. It is used to strengthen the heart, regulate heartbeat, reduce angina pain, and manage symptoms of heart failure such as dyspnea and edema.

Reasoning: The triterpenoids and flavonoids collectively enhance cardiac muscle contractility, improve coronary blood flow, reduce oxidative stress on the heart, and inhibit platelet aggregation. Modern research confirms its anti-ischemic, antihypertensive, and hypolipidemic effects.

Raktavikara (Bleeding Disorders, Piles, Menorrhagia)

Formulation: Bark powder or decoction.

Preparation & Use: Due to its astringent and styptic properties, Arjuna bark is used to treat bleeding disorders, including bleeding piles, menorrhagia (excessive menstrual bleeding), and hematuria (blood in urine).

Reasoning: The high concentration of tannins provides an astringent action, promoting vasoconstriction and protein precipitation at bleeding sites, which helps arrest blood flow.

Prameha (Diabetes) & Medoroga (Lipid Disorders/Obesity)

Formulation: Bark powder or aqueous extract.

Preparation & Use: Traditional use of Arjuna for metabolic disorders is supported by extensive modern research. The powder or extract is used to manage blood sugar levels and lower cholesterol.

Reasoning: Arjunolic acid and other flavonoids demonstrate antihyperglycemic activity and hypolipidemic effects by reducing total cholesterol, LDL, and triglycerides while potentially increasing HDL. A 2025 study found that a polyherbal formulation containing Arjuna significantly improved glucose tolerance and exhibited DPP-4 inhibitory activity.

Vrana (Wounds) & Twak Rogas (Skin Diseases)

Formulation: Bark powder paste or decoction wash.

Preparation & Use: The powdered bark is applied topically as a paste to wounds, ulcers, and skin inflammations to promote healing and reduce infection. A decoction is used as a wash for chronic non-healing ulcers.

Reasoning: The antimicrobial, astringent, and anti-inflammatory properties of tannins and flavonoids help cleanse the wound, reduce exudate, and promote tissue regeneration.

Jwara (Fever) & Kasa (Cough)

Formulation: Bark decoction.

Preparation & Use: Arjuna bark is traditionally used as a febrifuge (fever-reducing) and to manage cough, especially when associated with cardiac weakness.

Reasoning: The anti-inflammatory and antioxidant compounds may help modulate the inflammatory response during fever and reduce bronchial irritation.

Krimiroga (Helminthiasis - Intestinal Worms)

Formulation: Bark powder or decoction.

Preparation & Use: The bark is used as an anthelmintic to expel intestinal worms.

Reasoning: The antimicrobial and astringent properties of tannins may contribute to its efficacy against parasitic infections.

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6. Healing Recipes, Decoctions, and Preparations

Classic Arjuna Ksheerapaka (Milk Decoction)

Purpose: The most traditional and revered method for cardioprotection and as a general heart tonic.

Preparation & Use:

1. Take 3-6 grams of fine Arjuna bark powder.

2. Add to 1 cup of milk and 2 cups of water.

3. Simmer on low heat until the liquid is reduced to 1 cup, ensuring the milk does not curdle.

4. Strain and drink warm. This can be taken once or twice daily, typically for 1-2 months as a restorative course.

Simple Arjuna Bark Decoction (Kwath)

Purpose: For general cardiac support, hypertension, and hyperlipidemia.

Preparation & Use:

1. Take 1 teaspoon of dried, crushed bark.

2. Simmer in 2 cups of water for 15-20 minutes until the water is reduced by half.

3. Strain and drink warm. This can be taken twice daily.

Standardized Extract (Cardiboost)

Purpose: A modern standardized form for consistent dosing, targeting oxidative stress and cardiovascular protection.

Preparation & Use: Cardiboost is a proprietary standardized extract of T. arjuna bark containing 1% arjunolic acid. The research dose showed in vitro efficacy against thrombin and ACE, and in vivo cardioprotective effects in cellular models. Clinical dosing typically follows manufacturer or physician recommendations, often 500 mg every 8 hours.

Topical Wound-Healing Paste

Purpose: For external ulcers, wounds, and skin inflammation.

Preparation & Use:

1. Grind Arjuna bark powder with a small amount of water or honey to form a thick paste.

2. Apply directly to the affected area, cover with a clean cloth, and leave for 1-2 hours.

3. Wash off with warm water. Repeat once or twice daily.

Polyherbal Formulations for Diabetes

Purpose: To enhance metabolic and cardioprotective effects.

Preparation & Use: In recent 2025-2026 studies, Arjuna was combined with other herbs such as Embelia ribes, Centella asiatica, Commiphora mukul, and Emblica officinalis. These formulations showed superior glucose tolerance and myocardial salvaging effects. These should be prepared and administered by qualified practitioners only.

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7. In-Depth Phytochemical Profile and Clinical Significance of Terminalia arjuna (Arjuna)

Introduction

Terminalia arjuna is not merely a medicinal plant; it is a botanical institution, holding an unrivaled position in Ayurvedic cardiology for over 3,000 years. While modern medicine has developed potent synthetic drugs for heart disease, Arjuna offers a comprehensive, multi-targeted approach that addresses the complex, interconnected pathologies of cardiovascular disease including oxidative stress, inflammation, ischemia, hypertension, dyslipidemia, and thrombosis. Its therapeutic depth is driven by a unique synergy of pentacyclic triterpenoids (led by arjunolic acid), a rich matrix of cardioprotective flavonoids, and potent antioxidant tannins. Recent research from 2025 and 2026 has brought Arjuna into the spotlight of evidence-based medicine, validating ancient uses with cutting-edge science, including cellular cardioprotection, enzyme inhibition, anti-sickling properties, and even novel drug development from its lead compound, arjunolic acid. This convergence of tradition and modern validation solidifies Arjuna's status as the world's preeminent herbal cardiotonic.

1. Triterpenoids: The Signature Cardioprotective, Anti-ischemic, and Anti-diabetic Arsenal

Key Compounds: Arjunolic acid (the major constituent and lead molecule), Arjunic acid, Arjunetin, Arjungenin, Terminic acid, and their various glycosides (arjunosides, terminarjunosides). A 2025 LC-MS method was developed for simultaneous quantification of arjunetin, arjungenin, arjunolic acid, and arjunic acid in oil-based extractions.

Quantitative Profile: Arjunolic acid is the most abundant triterpenoid. A proprietary extract, Cardiboost, has been standardized to contain 1% arjunolic acid for consistent therapeutic effect.

Actions and Clinical Relevance:

· Cardioprotective and Anti-ischemic (Primary and Clinically Significant): Arjunolic acid and the total triterpenoid fraction are the primary agents responsible for Arjuna's profound cardiac benefits. The 2026 RSC Advances review comprehensively details that arjunolic acid exhibits cardio-protective, anti-ischemic, and antioxidant properties. A 2026 study on a standardized T. arjuna extract (Cardiboost, 1% arjunolic acid) demonstrated potent cardioprotective effects at the cellular level. In H9c2 cardiomyocytes exposed to H2O2-induced oxidative stress (a model of cardiac damage), Cardiboost averted cell death, significantly increased the levels of antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD), and reduced apoptosis. This confirms that arjunolic acid-rich extracts can directly shield heart cells from oxidative injury, a key mechanism in ischemia-reperfusion injury and heart failure.

· Antihypertensive and Vasodilatory: Cardiboost exhibited potent angiotensin-converting enzyme (ACE) inhibition with an IC50 of 196.66 μg/mL. ACE inhibitors are a cornerstone of modern hypertension treatment. This provides a direct mechanistic basis for Arjuna's traditional use in managing high blood pressure and reducing cardiac afterload.

· Antithrombotic and Antiplatelet: Cardiboost also demonstrated potent thrombin inhibition with an IC50 of 111.88 μg/mL. By inhibiting thrombin, a key enzyme in the coagulation cascade, Arjuna can help prevent pathological clot formation, reducing the risk of heart attacks and strokes. This is consistent with earlier findings that T. arjuna bark exhibits antiplatelet and anticoagulant action similar to aspirin.

· Anti-diabetic (Validated In Vivo and In Silico): A 2025 study evaluated a novel polyherbal formulation containing T. arjuna, Centella asiatica, and Embelia ribes. The formulation showed significant improvement in glucose tolerance in diabetic rats at a dose of 200 mg/kg. Computational ADME analysis confirmed favorable drug-likeness properties for arjunolic acid. Furthermore, a 2025 study on another polyherbal combination containing T. arjuna, Commiphora mukul, and Emblica officinalis demonstrated significant DPP-4 inhibitory activity, a key mechanism for modern anti-diabetic drugs, with the herbal combination showing superior myocardial-salvaging effects compared to the pharmaceutical DPP-4 inhibitor vildagliptin.

· Anti-cancer and Anti-inflammatory: The 2026 RSC Advances review also notes that arjunolic acid and its semi-synthetic derivatives have been extensively evaluated for anti-cancer, anti-inflammatory, and antioxidant properties. Arjunolic acid serves as a promising natural template for the synthesis of new drug leads with enhanced potency.

2. Flavonoids: The Antioxidant, Anti-inflammatory, and Endothelial Protective Arm

Key Compounds: Luteolin, Quercetin, Kaempferol, Baicalein, Apigenin, and the flavanol monomers and oligomers (+)-catechin, (−)-epicatechin, and proanthocyanidins.

Quantitative Profile: These are present in significant amounts in the bark, contributing to its total phenolic content and antioxidant capacity.

Actions and Clinical Relevance:

· Antioxidant (Potent and Complementary): The flavonoids are powerful free radical scavengers. They protect the vascular endothelium from oxidative damage, preserve nitric oxide bioavailability (essential for vasodilation), and prevent the oxidation of LDL cholesterol, a key step in atherogenesis. A 2025 review highlights these flavonoid activities as central to Arjuna's cardioprotection, anti-inflammatory, and hypolipidemic effects.

· Anti-inflammatory: Flavonoids inhibit pro-inflammatory enzymes (COX, LOX) and cytokine production, reducing systemic and vascular inflammation, which is a major contributor to atherosclerosis and heart failure.

3. Tannins and Phenolic Acids: The Astringent, Antioxidant, and Antimicrobial Foundation

Key Compounds: Gallic acid, Ellagic acid, Punicalagin, Castalagin, Casuariin, Terchebulin, Pyrocatechol.

Actions and Clinical Relevance:

· Astringent and Hemostatic: These high molecular weight polyphenols precipitate proteins, providing the classic astringent action. This is the direct mechanism for Arjuna's traditional use in bleeding disorders, wounds, and diarrhea, as they constrict tissues and reduce exudate.

· Antioxidant (Robust and Supportive): Gallic and ellagic acid are well-known potent antioxidants that complement the actions of flavonoids and triterpenoids, providing comprehensive systemic protection against oxidative stress.

· Antimicrobial: These compounds contribute to the broad-spectrum antimicrobial activity of the bark, validating its traditional use in wound healing and infections.

4. Special Metabolites from Leaf Galls: The Breakthrough for Sickle Cell Anaemia

Key Compound: 5-Hydroxymethylfurfural (5-HMF). This compound is produced in leaf galls formed by insect (Trioza fletcheri) attacks on Arjuna leaves.

Actions and Clinical Relevance:

· Anti-sickling (Novel Therapeutic Potential): A 2026 review article highlighted that 5-HMF, a primary bioactive compound found in the leaf galls, exhibits significant anti-sickling properties. Sickle cell anaemia is a debilitating genetic blood disorder. The ability of a compound from Arjuna to potentially inhibit the sickling of red blood cells opens a completely new and promising therapeutic avenue for this herb, extending its legacy beyond cardiovascular medicine.

An Integrated View of Healing in Terminalia arjuna

· For Ischemic Heart Disease, Angina, and Heart Failure: Arjuna acts as a comprehensive myocardial salvaging agent. First, direct cellular protection: Arjunolic acid-rich extracts shield cardiomyocytes from oxidative stress-induced death, a key factor in heart attack damage and heart failure progression. Second, hemodynamic support: ACE inhibition reduces blood pressure and cardiac workload, while thrombin inhibition prevents clot formation. Third, energetic and functional support: The herb improves cardiac contractility and exercise tolerance. Fourth, anti-ischemic effect: It improves coronary blood flow and reduces the frequency and severity of angina episodes. This multi-target action makes it a foundational herb for managing chronic stable angina, hypertension, and as an adjunct in heart failure.

· For Hyperlipidemia and Atherosclerosis: Arjuna addresses the root causes of plaque formation. Its flavonoids and triterpenoids lower total cholesterol, LDL, and triglycerides. Its potent antioxidants prevent the oxidation of these lipids, a critical step in the formation of atherosclerotic plaques. Its anti-inflammatory action reduces vascular inflammation. Its antiplatelet effects prevent thrombus formation on existing plaques. This comprehensive action can slow the progression of atherosclerosis and reduce the risk of myocardial infarction and stroke.

· For Metabolic Syndrome and Type 2 Diabetes: Arjuna provides a multi-modal strategy for metabolic health. First, glucose regulation: Arjunolic acid and polyherbal formulations containing Arjuna demonstrate significant anti-diabetic activity, improving glucose tolerance and exhibiting DPP-4 inhibition. Second, lipid management: It improves the entire lipid profile. Third, blood pressure control: It acts as a natural ACE inhibitor. Fourth, weight management: Its traditional use in obesity is supported by its metabolic effects. This makes Arjuna a powerful single herb for addressing the cluster of conditions that define metabolic syndrome.

· As a Source of Novel Drug Leads (Arjunolic Acid): The 2026 RSC Advances review firmly establishes arjunolic acid as a "natural product source for new drug leads." Its pentacyclic triterpene structure serves as an ideal template for semi-synthetic modifications to enhance its anti-cancer, anti-diabetic, and antioxidant activities. This is a significant scientific validation that Arjuna is not just a traditional remedy but a source of future pharmaceuticals.

· For Sickle Cell Anaemia (Emerging Frontier): The discovery of the anti-sickling compound 5-HMF in Arjuna leaf galls represents a paradigm shift in the plant's therapeutic profile. This could lead to a natural, affordable treatment for a disease that causes immense suffering, particularly in the Indian subcontinent where both Arjuna and sickle cell anaemia are prevalent.

Toxicological Profile and Safety Considerations

Terminalia arjuna has an excellent safety profile. Extracts are generally well-tolerated, with adverse reactions (constipation, headache, mild gastritis, abdominal discomfort) being mild, comparable to placebo, and infrequent. No toxicities occurred in mice at a single oral dose of 2,000 mg/kg.

However, the following considerations are critical:

· Anticoagulant Effect: Arjuna bark exhibits antiplatelet and anticoagulant action similar to aspirin. Therefore, it should be used with caution and only under medical supervision if already taking blood thinners (warfarin, clopidogrel, apixaban) or antiplatelet drugs (aspirin), as it may potentiate their effect and increase bleeding risk. It should ideally be discontinued 1-2 weeks before any elective surgery.

· Hepatotoxicity and Hypothyroidism: One older rat study suggested that very high amounts of T. arjuna extract could cause hepatotoxicity and hypothyroidism. This has not been reported in human clinical studies at standard therapeutic doses. However, it underscores the importance of using recommended doses and not self-administering massive quantities.

· Pregnancy and Lactation: Avoid use during pregnancy and breastfeeding due to a complete lack of modern safety data. The traditional knowledge base is insufficient to guarantee safety.

· Drug Interactions: Beyond anticoagulants, potential interactions with antihypertensive and anti-diabetic medications could occur, leading to additive effects and possible hypotension or hypoglycemia. Use under professional guidance is essential for individuals on these prescription drugs.

Conclusion: Terminalia arjuna is the undisputed "King of Herbs for the Heart." Its therapeutic depth, validated over millennia of traditional use and confirmed by a surge of modern research from 2025 and 2026, is unparalleled. The plant is not a single-action drug but a sophisticated, multi-target botanical system that simultaneously addresses oxidative stress, inflammation, thrombosis, hypertension, ischemia, and dyslipidemia. The recent discoveries of its standardized extract's (Cardiboost) potent thrombin and ACE inhibition at the cellular level, the anti-sickling potential of its leaf galls, and the role of arjunolic acid as a template for new anticancer and antidiabetic drugs have catapulted Arjuna into the forefront of evidence-based phytomedicine. It is a powerful, safe, and accessible herbal cardiotonic that can serve as a primary treatment for chronic heart conditions and an ideal adjunct to conventional care, bridging the ancient wisdom of Ayurveda with the stringent standards of modern pharmacology.

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Disclaimer:

Terminalia arjuna is generally well-tolerated, but due to its potent antiplatelet and anticoagulant effects, it must be used with extreme caution by individuals taking prescription blood thinners or antiplatelet medications. It should be discontinued before surgery. Individuals with pre-existing liver or thyroid conditions should use only under professional supervision. Pregnant and breastfeeding women should avoid use. Always consult a qualified healthcare professional, ideally one trained in Ayurvedic or herbal medicine, before starting Arjuna therapy, especially if you have a diagnosed medical condition or are taking other medications. This information is for educational purposes only and is not a substitute for professional medical advice.

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8. Reference Books, Books for In-depth Study:

· The Ayurvedic Pharmacopoeia of India (Part I, Volume II)

· Indian Medicinal Plants: An Illustrated Dictionary by C.P. Khare

· Textbook of Pharmacognosy and Phytochemistry by Biren Shah and A.K. Seth

· Charaka Samhita and Sushruta Samhita (Classical Ayurvedic Texts)

· Wealth of India: Raw Materials (CSIR publication)

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9. Further Study: Plants That Might Interest You Due to Similar Medicinal Properties

1. Commiphora mukul (Guggul)

· Species: Commiphora wightii | Family: Burseraceae

· Similarities: Guggul is the other preeminent herb for lipid management in Ayurveda, specifically for reducing cholesterol and triglycerides. It is often combined with Arjuna for comprehensive cardiovascular protection, with Arjuna focusing more on cardiac muscle and Guggul on lipid profiles.

2. Crataegus spp. (Hawthorn)

· Species: Crataegus oxycantha or monogyna | Family: Rosaceae

· Similarities: Hawthorn is the Western herbal counterpart to Arjuna. Both are premier cardiotonic herbs used for angina, heart failure, and hypertension. Both are rich in flavonoids and proanthocyanidins, strengthening the heart muscle and improving coronary blood flow. They are used almost interchangeably across their respective medical systems.

3. Inula racemosa (Pushkarmool/Pushkar)

· Species: Inula racemosa | Family: Asteraceae

· Similarities: In Ayurveda, Pushkarmool is specifically indicated for cardiac pain (angina pectoris) and palpitations, often in combination with Arjuna for enhanced effect. While Arjuna is a general cardiotonic, Pushkarmool is more specifically anti-anginal and may have additional bronchodilatory properties.

4. Terminalia chebula (Haritaki)

· Species: Terminalia chebula | Family: Combretaceae

· Similarities: As a close botanical relative, Haritaki shares many of Arjuna's antioxidant, anti-inflammatory, and hypolipidemic properties. However, Haritaki is primarily a tridoshic Rasayana (rejuvenative) and digestive tonic, while Arjuna has a specific, potent affinity for the heart. Together, they represent the two powerful arms of the Terminalia genus.

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Terminalia arjuna (Combretaceae) Arjuna - 'Heart healer'

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