Jatropha curcas (Euphorbiaceae) Purging Nut

Das K
Dec 1, 2025
12 min read

Updated: Jun 5

Jatropha curcas (Purging Nut)

1. Taxonomic Insights

Species: Jatropha curcas L.

Family: Euphorbiaceae

The Euphorbiaceae family, commonly known as the spurge family, comprises approximately 6,745 species across 218 genera of flowering plants. It is characterized by the production of milky latex, unisexual flowers, and a diverse array of chemical compounds including diterpenoids, alkaloids, and cyanogenic glycosides. This family is notably significant for both medicinal and toxic properties, containing well-known plants like castor oil plant (Ricinus communis), cassava (Manihot esculenta), and rubber tree (Hevea brasiliensis).

Taxonomic Note: The species name was first published by Carl Linnaeus in Species Plantarum in 1753. The genus name Jatropha is derived from the Greek words "iatros" meaning physician and "trophe" meaning food, indicating its medicinal use. The specific epithet curcas has uncertain origins, possibly derived from a vernacular name used in Asia. The plant is native to tropical America but is now widely naturalized across the Paleotropics, including India, Africa, and Southeast Asia. It is a shrub or small tree, reaching 2 to 5 meters in height, with watery juice and stout branches.

Related Herbs from the Same Family:

· Ricinus communis (Castor/Eranda): A well-known medicinal plant whose oil is a potent purgative, laxative, and anti-inflammatory agent, sharing similar purgative properties with J. curcas.

· Croton tiglium (Jamalgota): A highly toxic plant with seeds used as a powerful purgative, considered milder than Croton but more drastic than castor oil, often compared to J. curcas in potency.

· Euphorbia hirta (Dudhi): A common medicinal weed used for respiratory conditions, diarrhea, and as a galactagogue, with a significantly milder toxicity profile.

· Manihot esculenta (Cassava): A major food crop whose tubers contain cyanogenic glycosides requiring processing for safe consumption, similar to Jatropha's seed detoxification needs.

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2. Common Names

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3. Medicinal Uses

Primary Actions: Purgative, Anti-inflammatory, Analgesic, Antimicrobial, Anticancer, Antidiabetic, Antipyretic.

Secondary Actions: Anthelminthic, Antirheumatic, Wound healing, Antiviral, Anticoagulant, Hepatoprotective, Antioxidant.

Medicinal Parts:

Every part of the plant the leaves, seeds, seed oil, bark, roots, and latex is used medicinally, each with specific therapeutic indications and toxicity considerations.

· Leaves: The most commonly used part for external applications. Employed for wounds, skin diseases, inflammation, rheumatism, and fever. Leaf juice is used to arrest bleeding from wounds. They contain flavonoids, tannins, and anti-inflammatory compounds.

· Seeds: Highly toxic, used only after careful processing as a drastic purgative. The seeds contain phorbol esters, curcin (a toxalbumin), and fatty oil.

· Seed Oil: Used externally for rheumatic pain, skin diseases, and as a hair tonic. Internally, it acts as a powerful purgative. The oil is also a major feedstock for biodiesel production.

· Bark and Root Bark: Applied externally to sores, wounds, and animal bites. Root bark decoction is used as a mouth rinse for toothache and stains.

· Latex: The milky sap is applied to wounds and skin infections.

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4. Phytochemicals Specific to the Plant and Their Action

Jatropha curcas is a rich reservoir of secondary metabolites, with diterpenoids and cyclic peptides being the dominant bioactive classes.

· Phorbol Esters (12-Deoxy-16-hydroxyphorbol, Jatropha Factors C1-C6): These are the signature toxic diterpenoids. They exhibit Antimicrobial, Antitumor, Molluscicidal, Insecticidal, and Cytotoxic activities. However, they are also potent tumor promoters and are responsible for the purgative and irritating effects. Quantitative risk assessment has established an Acute Reference Dose of 139.64 μg/kg body weight for these compounds.

· Curcin (Ribosome-Inactivating Protein): A type 1 RIP isolated from seeds and seed coats. It works as an Antimicrobial and Anticancer agent. Jc-SCRIP from the seed coat inhibits protein synthesis, showing strong cytotoxicity against breast, colon, and liver cancer cell lines.

· Other Diterpenoids (Jatropholone A/B, Jatrophol, Jatrogrossidione, Riolozatrione): These contribute to Antiplasmodial, Gastroprotective, Cytotoxic, and Anti-inflammatory effects.

· Flavonoids (Quercetin, Kaempferol): Present in leaves, these provide Antioxidant, Anti-inflammatory, and Antimicrobial properties.

· Tannins & Saponins: Found in leaves, providing Astringent, Wound healing, and Antimicrobial effects.

· Cyclic Peptides: A class of compounds contributing to various bioactivities including immunosuppressive effects.

· Alkaloids: Present in smaller quantities, contributing to analgesic and CNS effects.

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5. Traditional and Ethnobotanical Uses Covering the Medicinal Uses

Atisara (Dysentery) & Krimiroga (Helminthiasis)

Formulation: Seed oil (external) or processed seeds (internal).

Preparation & Use: In traditional systems across India and Africa, the fruit and seed are used for chronic dysentery and as an anthelmintic. Due to high toxicity, this use is strictly under professional supervision.

Reasoning: The purgative action of phorbol esters and the anti-amoebic properties of other compounds help clear intestinal pathogens and parasites.

Vrana (Wounds) & Tvak Rogas (Skin Diseases)

Formulation: Leaf poultice; leaf juice; seed oil.

Preparation & Use: Leaf pulp is applied to open wounds, ulcers, and to arrest bleeding. Leaf juice is used for eczema, ringworm, scabies, and whitlow. Among the Kongo people of DR Congo, a poultice of leaf pulp is used to promote healing. In Kerala, leaf juice is used externally for bleeding wounds.

Reasoning: The antimicrobial activity of Jc-SCRIP against S. epidermidis and flavonoids combats infection. Tannins provide astringent action to reduce bleeding and promote wound contraction. Anti-inflammatory compounds reduce swelling.

Shotha (Inflammation) & Vata Rakta (Rheumatism)

Formulation: Leaf decoction; seed oil massage.

Preparation & Use: A decoction of leaves is taken internally for rheumatism. Seed oil is warmed and massaged onto painful joints and muscles. The Yoruba of Nigeria use a leaf decoction for fever reduction.

Reasoning: The anti-inflammatory and analgesic effects have been validated in animal models. Methanolic leaf extract significantly decreased carrageenan-induced rat paw edema and increased pain threshold in acetic acid-induced writhing tests, comparable to standard drugs like Piroxicam and Paracetamol.

Jwara (Fever)

Formulation: Leaf infusion or decoction.

Preparation & Use: In Nigeria, a decoction of fresh leaves boiled for 15 minutes is drunk to reduce fever. In Mexico, a mild tea of dried leaves is used for skin irritation associated with fever.

Reasoning: The antipyretic action is attributed to flavonoids and other compounds that inhibit prostaglandin synthesis. Traditionally, the leaves are boiled or macerated to lessen the irritant phorbol esters before use.

Danta Roga (Toothache)

Formulation: Root bark decoction.

Preparation & Use: Root bark is boiled with water, and the decoction is used to rinse the mouth to relieve toothache and remove stains from teeth.

Reasoning: The analgesic and antimicrobial properties of the root bark compounds help alleviate dental pain and infection.

Madhumeha (Diabetes Mellitus)

Formulation: Leaf extract; stem bark extract.

Preparation & Use: Traditional practitioners use various parts of the plant to manage blood sugar levels.

Reasoning: Modern research provides robust validation. A 2025 network pharmacology study identified 47 compounds meeting absorption criteria from 104 compounds. 16 were directly related to diabetes. Molecular docking revealed that compounds like heudelotinone (ACHE), jatrogrossidione (PDE5A), 17α-hydroxypregnenolone (CISD1), and princepin (CA7) exhibited strong binding affinities. Key targets included migration inhibitory factor, diabetic complications, and insulin resistance pathways.

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6. Healing Recipes, Decoctions, and Preparations

Extreme Caution: This plant is toxic. All preparations should be made under professional guidance only.

Wound Healing Leaf Poultice (External Use Only)

Purpose: Topical application for wounds, ulcers, and skin infections.

Preparation & Use:

1. Take a handful of fresh Jatropha curcas leaves.

2. Wash thoroughly and grind into a smooth pulp.

3. Apply directly to the affected area, cover with gauze, and leave for 30 minutes before rinsing.

4. WARNING: Do not apply to open, bleeding wounds without professional guidance. For external use only.

Anti-inflammatory Leaf Decoction (External Wash for Skin/Rheumatism)

Purpose: Washing inflamed skin or rheumatic joints.

Preparation & Use:

1. Take 10-15 grams of dried leaves.

2. Simmer in 1 liter of water for 15-20 minutes.

3. Cool and strain. Use the liquid to wash affected areas.

4. WARNING: Not for internal consumption.

Toothache Root Bark Rinse

Purpose: Relieving tooth pain and cleaning teeth.

Preparation & Use:

1. Take a small piece of root bark.

2. Boil in 250 ml of water for 10 minutes.

3. Cool and strain. Use as a mouth rinse.

4. WARNING: Do not swallow the rinse.

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7. In-Depth Phytochemical Profile and Clinical Significance of Jatropha curcas (Dravanti)

Introduction

Jatropha curcas, known as the Physic Nut, is a botanical paradox a plant of immense therapeutic potential shadowed by extreme toxicity. For centuries, it has served as a "village pharmacy" across the tropics, yet its seeds have also been responsible for fatal poisonings worldwide. In the modern era, J. curcas has emerged as a subject of intense scientific scrutiny, not only for its biodiesel potential but for its complex pharmacognosy. Its therapeutic identity is shaped by a dangerous yet fascinating arsenal of phorbol esters, ribosome-inactivating proteins (curcin), and diverse diterpenoids. Recent breakthroughs include a 2025 network pharmacology study elucidating its antidiabetic mechanisms via molecular docking, the discovery of Jc-SCRIP's potent antimicrobial and anticancer properties, and quantitative toxicological risk assessments defining safe exposure limits for its phorbol esters. J. curcas stands as a powerful testament to the thin line between medicine and poison.

1. Phorbol Esters: The Toxic Signature and Bioactive Dilemma

Key Compounds: 12-Deoxy-16-hydroxyphorbol (DHPB), Jatropha Factors C1-C6, various phorbol derivatives.

Quantitative Profile: Seeds contain 35-40% oil by mass. Phorbol esters are the primary toxic constituents. A quantitative risk assessment using the Benchmark Dose approach established an Acute Reference Dose of 139.64 μg/kg body weight and a Health-Based Guidance Value for sub-chronic exposure of 0.0105 mg/kg body weight per day.

Actions and Clinical Relevance:

· Antimicrobial and Antitumor (Potent): Phorbol esters demonstrate significant antimicrobial, antitumor, molluscicidal, and insecticidal activities. This validates traditional uses for parasitic and infectious conditions.

· Tumor Promotion (Major Toxicity): Despite their antitumor activity in some contexts, phorbol esters are also well-documented tumor promoters. This dual nature makes them double-edged swords requiring careful dose control.

· Purgative and Irritant: These compounds are responsible for the drastic purgative action and skin irritation associated with the seed oil.

· Detoxification Target: The risk assessment concluded that for the seed oil to be considered for human consumption, a detoxification rate of 99.5% of phorbol esters is required. This highlights the extreme potency of these toxins.

2. Ribosome-Inactivating Proteins: The Anticancer and Antimicrobial Vanguard

Key Compound: Jc-SCRIP (Type 1 RIP from seed coat), Curcin (from seeds).

Mechanism: As a type 1 RIP, Jc-SCRIP works by depurinating a specific adenine residue in the 28S rRNA, leading to the irreversible inhibition of protein synthesis and subsequent cell death.

Quantitative Profile: The purification fold of Jc-SCRIP increased 113.8 times, with a yield of 1.13% of total protein. It is a monomeric glycoprotein with a molecular mass of 38,938 Da.

Actions and Clinical Relevance:

· Anticancer (Highly Cytotoxic): Jc-SCRIP demonstrated potent in vitro cytotoxicity against human breast adenocarcinoma (MCF-7, IC50 0.15 mM), colon adenocarcinoma (SW620, IC50 0.25 mM), and liver carcinoma (HepG2, IC50 0.40 mM) cell lines. This positions J. curcas as a promising source of natural anticancer agents.

· Antimicrobial (Potent): Jc-SCRIP exhibited strong antimicrobial activity against nine human pathogenic bacteria. The most potent inhibitory activity was against Staphylococcus epidermidis ATCC 12228, with a minimum inhibitory concentration value of 0.20 μM.

· Hemagglutination Activity: The protein also exhibited hemagglutination activity, indicating its ability to bind to cell surfaces.

3. Other Diterpenoids and Secondary Metabolites

Key Compounds: Jatropholones A/B, Jatrogrossidione, Heudelotinone, Princepin, Riolozatrione.

Actions and Clinical Relevance:

· Antidiabetic (2025 Breakthrough): A 2025 network pharmacology and molecular docking study revealed that 47 out of 104 compounds in J. curcas meet absorption criteria (Lipinski's Rule of Five). Of these, 16 compounds are directly related to Diabetes Mellitus. Key active compounds identified include jatrophalactam, migration inhibitory factor (MIF) modulators, and compounds targeting diabetic complications and insulin resistance. Molecular docking showed significant binding affinities: heudelotinone (ACHE) at -11.2 kcal/mol, jatrogrossidione (PDE5A) at -10.1 kcal/mol, and 17α-hydroxypregnenolone (CISD1) at -8.3 kcal/mol.

· Gastroprotective: Jatropholones have documented gastroprotective activity, supporting traditional use in gastrointestinal ailments when properly processed.

· Antiplasmodial: Some diterpenoids exhibit activity against Plasmodium parasites, suggesting potential in malaria treatment.

4. Flavonoids, Tannins, and Phenolic Compounds

Key Compounds: Quercetin, Kaempferol, various tannins.

Quantitative Profile: Phytochemical screening confirmed the presence of flavonoids, steroids, triterpenoids, alkaloids, tannins, and saponins.

Actions and Clinical Relevance:

· Anti-inflammatory (Validated In Vivo): Methanol extract of leaves (10-80 mg/kg) caused a statistically significant, dose-dependent inhibition of egg albumin-induced edema in rats, comparable to the standard drug Piroxicam (0.5 mg/kg). The extract also significantly reduced acetic acid-induced writhing in mice, comparable to Paracetamol.

· Wound Healing: Tannins and flavonoids work synergistically to promote wound contraction, reduce bleeding, and prevent infection.

An Integrated View of Healing in Jatropha curcas

· For Cancer Treatment (Anticancer Potential): J. curcas offers a sophisticated multi-level approach to oncology through its ribosome-inactivating protein Jc-SCRIP. Unlike traditional chemotherapeutics that affect both healthy and cancerous cells, RIPs can be targeted for selective cytotoxicity. The IC50 values against breast, colon, and liver cancer cells are highly promising. The identification of multiple cytotoxic diterpenoids and phorbol esters adds to this oncological potential, though the tumor-promoting activity of some phorbol esters requires careful compound isolation rather than crude extract use.

· For Inflammatory and Painful Conditions (Arthritis and Rheumatism): The plant's anti-inflammatory and analgesic effects have been rigorously validated. The methanolic leaf extract works through both central and peripheral mechanisms, as demonstrated by the reduction of both carrageenan-induced paw edema (inflammation) and acetic acid-induced writhing (visceral pain). The effects were dose-dependent and comparable to pharmaceutical standards, providing scientific basis for its traditional use in rheumatism.

· For Wound Healing and Skin Infections: The combination of potent antimicrobial activity (from Jc-SCRIP and flavonoids), astringent tannins, and anti-inflammatory compounds makes J. curcas a powerful wound healing agent. The leaf poultice addresses infections, reduces bleeding, controls inflammation, and promotes tissue contraction. The specific activity against S. epidermidis is particularly relevant for skin and wound infections.

· For Diabetes Management (Emerging Application): The 2025 network pharmacology study provides compelling evidence for J. curcas as an antidiabetic agent. By identifying specific compounds and their binding affinities to key diabetes-related targets (ACHE, PDE5A, CISD1, CA7), researchers have mapped the molecular pathways involved. This multi-target approach explains the plant's traditional use and opens avenues for developing standardized extracts for metabolic disorders.

· As a Potential Detoxified Nutraceutical: While historically the seed oil has been too toxic for human consumption, recent quantitative risk assessments have established clear detoxification targets. A 99.5% reduction in phorbol esters would bring the oil within safe exposure limits. This could transform J. curcas from a dangerous poison to a valuable source of protein (seed cake) and healthy oils for human consumption, representing a paradigm shift in how this plant is utilized.

Toxicological Profile, Quality Control, and Safety Considerations

Major Toxicity: J. curcas is highly toxic, with the seeds being the most poisonous part. The toxic constituents are curcin (a toxalbumin that inactivates ribosomes and inhibits protein synthesis) and phorbol esters (which cause purgative effects).

Toxic Dose: As few as 3 seeds can be toxic. The reported lethal dose is 7-8 seeds. Multiple cases of poisoning after accidental ingestion, most commonly in children, have been reported worldwide.

Poisoning Features: Symptoms include nausea, vomiting, severe diarrhea, abdominal pain, vertigo, delirium, muscle twitching, convulsions, hemolysis, respiratory failure, circulatory failure, and death in severe cases.

Clinical Management: Supportive treatment including correction of fluid and electrolyte disturbances. Activated charcoal therapy has been used for gastrointestinal decontamination.

Traditional Safety Measures: Traditional preparation methods such as boiling, roasting, or macerating leaves are used to lessen the irritant phorbol esters before use. This is supported by the detoxification research targeting a 99.5% reduction in these compounds.

Precautions: For external use only in most contexts. Internal use is strictly contraindicated without expert professional supervision. Pregnant, lactating women, and children should avoid all contact with seeds and internal preparations.

Conclusion: Jatropha curcas is a dangerous yet indispensable medicinal plant that epitomizes the dual nature of phytomedicine poison and cure, toxin and therapy. Its therapeutic significance is built upon a foundation of unique and potent compounds phorbol esters with antimicrobial and antitumor activity, ribosome-inactivating proteins with potent anticancer effects, and diverse diterpenoids with validated anti-inflammatory and analgesic properties. The 2025 breakthroughs in network pharmacology and molecular docking have for the first time mapped its antidiabetic mechanisms at the molecular level, while quantitative toxicological assessments have set clear safety benchmarks for its future development. J. curcas remains a plant to be treated with the utmost respect and caution, yet its potential as a source of anticancer drugs, detoxified nutraceuticals, and anti-inflammatory agents places it at the forefront of medicinal plant research.

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Disclaimer:

Jatropha curcas is highly toxic. The seeds are the most poisonous part; as few as 3 seeds can be toxic, and 7-8 seeds can be lethal. All internal use is strictly contraindicated without expert professional supervision. External use of leaves should avoid contact with eyes and open wounds. Pregnant and lactating women should avoid all contact. The seed oil should never be consumed unless professionally processed and certified detoxified. 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:

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

· The Ayurvedic Pharmacopoeia of India (Relevant Volumes)

· Medicinal Plants of the World by Ben-Erik van Wyk and Michael Wink

· Poisonous Plants of India by R.N. Chopra

· Jatropha curcas: A Review (Journal of Ethnopharmacology, 2013)

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

1. Ricinus communis (Castor/Eranda)

· Species: Ricinus communis | Family: Euphorbiaceae

· Similarities: Sharing the same family, both plants produce highly toxic seeds containing ricin (castor) and curcin (Jatropha), both ribosome-inactivating proteins. Both seed oils are used as potent purgatives and for external applications in rheumatism and skin diseases. Castor oil is safer for internal use after processing, while Jatropha oil remains more toxic.

2. Croton tiglium (Jamalgota)

· Species: Croton tiglium | Family: Euphorbiaceae

· Similarities: Another Euphorbiaceae member with seeds used as a powerful purgative. Its oil is considered intermediate in potency between castor oil (milder) and Jatropha oil. Both contain phorbol esters and are used externally for skin diseases and rheumatism.

3. Baliospermum montanum (Danti)

· Species: Baliospermum montanum | Family: Euphorbiaceae

· Similarities: Known as "Danti" in Ayurveda, this plant shares similar purgative and anti-inflammatory properties with J. curcas (known as "Dravanti"). Both are used in classical Ayurvedic formulations for constipation, skin diseases, and inflammation, though Danti is considered less toxic.

4. Manihot esculenta (Cassava)

· Species: Manihot esculenta | Family: Euphorbiaceae

· Similarities: Cassava tubers contain cyanogenic glycosides that require detoxification processing before consumption, similar to Jatropha seeds requiring detoxification of phorbol esters. Both represent Euphorbiaceae plants where traditional processing transforms potential poisons into safe nutrients.

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Jatropha curcas (Euphorbiaceae) Purging Nut

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