Pongamia pinnata (Fabaceae) Karanja, Honge

Jan 12

16 min read

Updated: Jul 10

Pongamia pinnata is a versatile, multi-purpose legume tree with a broad spectrum of scientifically validated pharmacological activities, particularly notable for its potent antidiabetic effects demonstrated in human clinical trials . It has significant anti-inflammatory activity with no ulcerogenic effects and exhibits strong antimicrobial, antioxidant, and anticancer potential . The tree is a rich source of bioactive furanoflavonoids, with karanjin and pongamol being its trademark compounds . It is drought-resistant, salt-tolerant, and thrives in adverse climatic conditions . The seed oil, traditionally used for skin ailments and rheumatism, is also a source of biodiesel, making this a plant of significant economic and medicinal value . Most parts of the plant are used in traditional medicine, especially in Ayurveda and Siddha . The plant has a high safety profile, with no significant toxicity reported in animal studies . Significant research gaps exist in detailed mechanistic studies and further human clinical trials. The plant has high commercial potential as a source of nutraceuticals, pharmaceuticals, and bioenergy.

Karanja seed oil is most notably used to treat skin infections, wounds, eczema, scabies, and lice due to its potent, broad-spectrum activity against bacteria, fungi, and parasites.

1. Taxonomic Insights

Species: Pongamia pinnata (L.) Pierre

Family: Fabaceae (Leguminosae)

Genus: Pongamia

Basionym: Cytisus pinnatus L.

Synonyms: Millettia pinnata (L.) Panigrahi, Pongamia glabra Vent., Derris indica (Lam.) Bennet

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Botanical Description

Pongamia pinnata is a fast-growing, medium-sized, glabrous, semi-evergreen tree with a short bole and a spreading crown. It can grow up to 18 metres or more in height .

Key Identification Features: The tree features a long, thick taproot that makes it drought-tolerant and a dense network of lateral roots that help in soil erosion control . The leaves are pinnate, spiral, and stipulate, typically with 5 to 7 leaflets that are opposite, thinly coriaceous (leathery), oblong-ovate in shape, and measure 6 to 10 centimetres in length by 3 to 5 centimetres in width .

The inflorescences are axillary racemes. The flowers are light purple with a campanulate calyx and a broad standard petal. The stamens are monadelphous (united into one bundle), with the upper filament being free below. The style is incurved and the stigma is capitate .

The fruit is a woody, flattened, oblong, indehiscent pod, measuring 4 to 6 centimetres in length and 2.5 to 3 centimetres in width. The seeds are characteristically kidney-shaped (reniform) .

Distribution: The plant is native to the Indian subcontinent, Southeast Asia, Northern and Eastern Australia, and tropical America . It is distributed throughout India, from the central or eastern Himalaya to Kanyakumari, and is found in the littoral regions of Southeastern Asia, Sri Lanka, Burma, Malaya, Australia, Florida, Hawaii, Malaysia, Oceania, Philippines, Polynesia, and the Seychelles . It grows up to an altitude of 1,200 metres and thrives in coastal areas, beaches, mangroves, and on marginal land .

Conservation Status: Not formally evaluated by the IUCN; however, the species is widespread, considered naturalised, and is not under threat.

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Etymology

The generic name Pongamia is derived from the Tamil word 'Pungu', a local name for the tree . The specific epithet pinnata is Latin for "feathered" or "winged", referring to the pinnate (feather-like) arrangement of its leaves.

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2. Common Names

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3. Related Herbs from the Fabaceae Family

The Fabaceae family is one of the largest and most economically important families, rich in nitrogen-fixing species, edible pulses, and medicinal plants.

Glycine max (Soybean): A globally significant crop known for high protein and isoflavone content. Soy isoflavones like genistein are studied for their antioxidant and anticancer properties.

Psoralea corylifolia (Babchi): A medicinal plant from the Fabaceae family, famous for its phototoxic and skin-healing properties due to the furanocoumarin psoralen.

Tephrosia purpurea (Sharpunkha): A well-known herb in Ayurveda, used for its hepatoprotective and antimicrobial properties. It belongs to the same subfamily (Faboideae) as Pongamia.

Butea monosperma (Palash): A tree of the Fabaceae family, used traditionally for its astringent and anti-inflammatory properties. Its seeds and flowers are used in Ayurvedic medicine.

Cajanus cajan (Pigeon Pea): A highly nutritious and drought-tolerant pulse crop, valued for its protein-rich seeds and used in traditional medicine for various ailments.

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4. Medicinal Uses: Summary of Primary and Secondary Actions

Primary Actions:

Antidiabetic: Demonstrates significant blood glucose-lowering effects. In type-2 diabetic patients, aqueous and alcoholic extracts of flowers and leaves significantly decreased mean plasma glucose and eliminated glycosuria after just two weeks of administration .

Anti-inflammatory: Exhibits potent anti-inflammatory activity in acute, subacute, and chronic models of inflammation. The 70% ethanolic leaf extract (PLE) shows significant activity without causing gastric lesions . Acetone leaf extract shows 76% albumin denaturation inhibition and 61% anti-lipoxygenase activity .

Antimicrobial: Demonstrates significant antimicrobial effects against various bacterial and fungal species, including Corynebacterium diphtheriae, Pseudomonas aeruginosa, and Shigella flexneri. This activity is attributed to its diverse phytochemical composition .

Antioxidant: Acetone leaf extract shows high DPPH radical scavenging activity (87.5% inhibition at 625 µg/mL) . Seed ethyl acetate fractions also show significant antioxidant activity, confirming the plant's strong free radical quenching potential .

Wound Healing: Used extensively in traditional medicine for wound treatment. Seed oil and leaf paste are applied topically to heal wounds, and scientific reviews support this traditional use .

Antiparasitic: Methanol extract of the bark inhibited P. falciparum (IC50 of 11.6 µg/mL). It also reduced P. berghei parasitemia in mice at an oral dose of 1000 mg/kg/day .

Secondary Actions:

Hepatoprotective: Traditionally used for liver pain and to treat hepatic disorders .

Analgesic: Used in traditional medicine for pain relief, which is supported by its significant anti-inflammatory mechanisms .

Anthelmintic: The seed oil is traditionally used to kill helminths, and the leaves and fruit are also considered anthelmintic .

Antirheumatic: Seed oil is specifically applied to treat rheumatism and joint pain. Karanjin is shown to reduce collagen breakdown and TNF-α production in arthritis models .

Insecticidal: The seed oil contains active ingredients that have potential as organic insecticides .

Immunomodulatory: Shows activity in modulating the immune system, with various extracts exhibiting immunomodulatory properties .

Cytotoxic/Anticancer: Possesses preliminary cytotoxic potential, with some flavonoid compounds showing activity against cancer cell lines .

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Medicinal Parts

The whole plant is used, with specific applications for different parts.

Leaves: Considered digestive, laxative, and anthelmintic. They are used to treat diarrhoea, leprosy, dyspepsia, cough, rheumatism, gonorrhoea, and for wound healing . The 70% ethanolic extract of leaves (PLE) is validated for strong anti-inflammatory activity .

Flowers: Specifically useful in treating diabetes, dyspepsia (dypsia), and balancing vata and Kapha doshas .

Bark/Stem: The fresh bark is fragrant and mucilaginous. It is used to treat diabetes, malaria, piles, beriberi, ophthalmopathy, vaginopathy, skin diseases, and intestinal disorders. It has strong anthelmintic and wound-healing properties .

Roots: Used for cleaning teeth, treating ulcers, strengthening gums, treating gonorrhea, and for vaginal and skin diseases. Root paste is applied to treat scrofulous enlargement .

Seeds: The primary commercial part. Rich in 27.5% fatty oil, comprising approximately 79.4% unsaturated fatty acids (oleic, linoleic, linolenic). Used for rheumatism, ulcers, chronic fever, leprosy, and scabies .

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5. Phytochemistry

5.1 Karanjin and Major Furanoflavonoids

Pongamia pinnata is renowned for its rich furanoflavonoid content. Karanjin is the "trademark compound" of this species, first isolated in 1925 .

Karanjin: A furanoflavone demonstrating anti-inflammatory activity. It has been shown to reduce collagen and cartilage breakdown markers and TNF-α production, and inhibit NF-κB and reactive oxygen species in arthritis models. In seeds, it can be present in concentrations up to 1.465% .

Pongamol: A benzofuran derivative and another major bioactive compound responsible for various pharmacological activities .

Other identified furanoflavonoids and flavonoids: Pongagalabrone, Pongapin, Pinnatin, Kanjone, along with flavones, flavans, and chalcones . The total flavonoid and phytocompound content contributes significantly to its medicinal properties.

5.2 Terpenoids and Phytosterols

Beta-sitosterol and Stigmasterol: These phytosterols show strong anti-inflammatory properties and are partly responsible for the plant's traditional use in treating rheumatism .

Linolenic acid: An essential fatty acid that also demonstrates anti-inflammatory properties .

5.3 Compounds from Leaf Extract (Acetone Extract)

Gas Chromatography-Mass Spectrometry (GC-MS) analysis confirms the presence of 9 functional groups with bioactive properties. The acetone extract is particularly rich in total phenolic content, tannins, glycosides, flavonoids, steroids, and saponins .

5.4 Other Compounds

Seed Oil Composition: The seeds are highly oleaginous. The oil is composed of 20.5% saturated fatty acids (palmitic acid 10.8%, stearic acid 8.7%) and 79.4% unsaturated fatty acids (oleic acid 46%, linoleic acid 27.1%, linolenic acid 6.3%) . This rich fatty acid profile, along with the furanoflavonoids, makes it valuable for both medicinal and industrial uses .

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6. Mechanisms of Action

6.1 Antidiabetic Activity

The antidiabetic mechanism of Pongamia pinnata appears to be multifaceted. Clinical studies indicate that different parts of the plant (flowers, leaves) and various extracts (aqueous, alcoholic) all significantly lower blood glucose levels. In a clinical trial involving type-2 diabetic patients, the administration of 5g/day of alcoholic leaf extract reduced mean plasma glucose from 210 mg/dL to 100 mg/dL, showcasing potent glucose-lowering efficacy . This is thought to be due to the presence of flavonoids and other phytochemicals that enhance insulin sensitivity, stimulate insulin secretion, or inhibit enzymes like alpha-glucosidase, although further research is required to pinpoint the exact pathway .

6.2 Anti-inflammatory Activity

The anti-inflammatory mechanism is well-documented. The 70% ethanolic leaf extract (PLE) showed significant anti-inflammatory effects against acute, subacute, and chronic inflammation . Key compounds like karanjin inhibit the production of pro-inflammatory cytokines (TNF-α) and suppress inflammatory markers (NF-κB, nitric oxide, ROS). The activity is further supported by the presence of linolenic acid, β-sitosterol, and stigmasterol, all known for their anti-inflammatory properties .

6.3 Antimicrobial Activity

The broad-spectrum antimicrobial activity is attributed to its complex phytochemical profile, which includes flavonoids, saponins, tannins, and terpenes. These compounds can disrupt microbial cell walls, inhibit protein synthesis, or interfere with membrane function, making the extracts effective against a range of pathogenic bacteria such as C. diphtheriae, P. aeruginosa, and S. flexneri .

6.4 Antioxidant Activity

The antioxidant potential is mediated through its high phenolic and flavonoid content. These compounds act as potent free radical scavengers, as evidenced by strong DPPH radical scavenging activity. This ability to neutralise oxidative stress is central to the plant's hepatoprotective, anti-inflammatory, and anti-aging properties .

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7. Traditional and Ethnobotanical Uses

7.1 Diabetes Management (Madhumeha)

Formulation: Flower or leaf powder/extract.

Preparation and Use: In Ayurveda, the flowers and leaves are traditionally used to manage diabetes. The dried powder or aqueous/alcoholic extracts of flowers and leaves are administered to patients to control blood sugar levels .

Scientific Validation: Clinical studies confirm that dry powdered leaves, and their aqueous and alcoholic extracts, produce significant blood glucose-lowering effects in type-2 diabetic patients. High doses (5 g/day) can normalise blood glucose levels and eliminate glycosuria .

7.2 Wound Healing (Vrana Ropana)

Formulation: Seed oil or leaf paste.

Preparation and Use: The seed oil is widely used as a topical application for wounds, ulcers, and skin diseases. A paste of the leaves is also applied to the affected area to promote healing .

Scientific Validation: The traditional use is supported by scientific reviews that acknowledge the plant's potent wound-healing activity, likely due to its antimicrobial and anti-inflammatory properties, which prevent infection and promote tissue regeneration .

7.3 Rheumatism and Arthritis (Vata Rog)

Formulation: Seed oil.

Preparation and Use: Pongamia seed oil is applied externally to alleviate joint pain, rheumatism, and lumbago .

Scientific Validation: Research shows that karanjin, a key component of the oil, prevents joint damage and reduces inflammatory markers like TNF-α and NF-κB, confirming its use in treating arthritis .

7.4 Skin Diseases (Kushtha) and Piles

Formulation: Seed oil or leaf paste.

Preparation and Use: The plant is a traditional remedy for numerous skin afflictions, including leucoderma, scabies, leprosy, and for treating piles (hemorrhoids) .

Scientific Validation: The strong antimicrobial, anti-inflammatory, and antiparasitic properties validated by modern research provide a strong scientific basis for these traditional applications .

7.5 Regional Ethnomedicinal Applications

India (Ayurveda): All parts used. The plant is a primary source for managing skin diseases, wounds, rheumatism, diabetes, and piles .

Malaysia (Malay traditional medicine): Used to treat beriberi and as a traditional remedy .

Sri Lanka: Used in traditional medicine .

Fiji: Used in traditional medicine .

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8. Healing Recipes, Teas, Decoctions, and Culinary Uses

*Please Note: Pongamia pinnata seed oil and raw seeds are bitter and toxic if not processed correctly; they are NOT for culinary consumption as food. The following are traditional medicinal preparations. *

8.1 Antidiabetic Leaf Decoction

Purpose: To help manage blood sugar levels.

Preparation and Use: Take 5 grams of dried Pongamia pinnata leaves (or the alcoholic/aqueous extract in equivalent dosage). In clinical studies, 5 grams/day of the dried powdered leaf was effective. Steep the dried powder in 250 mL of hot water for 10 to 15 minutes. Strain and drink this infusion once daily, preferably before a meal, to help control postprandial glucose levels .

Scientific Validation: Clinical research confirms that alcoholic extracts of leaves at a dose of 5 g/day significantly lower blood glucose, with a mean drop from 210 mg/dL to 100 mg/dL in type-2 diabetic patients .

8.2 Wound Healing Oil/Ointment

Purpose: To treat wounds, cuts, and skin ulcers.

Preparation and Use: Pongamia seed oil is applied directly to the affected area. For a more complex preparation, the seed oil can be gently heated and mixed with a base like beeswax to form a salve. Apply the oil or salve topically to the wound and cover with a clean dressing .

Scientific Validation: The antimicrobial and anti-inflammatory properties of the seed oil, driven by compounds like karanjin, support its use in wound care by preventing infection and reducing inflammation .

8.3 Traditional Poultice for Skin Diseases

Purpose: To treat skin afflictions like scabies, leucoderma, and eczema.

Preparation and Use: Wash a handful of fresh Pongamia pinnata leaves and grind them into a smooth paste. Apply this paste directly to the affected skin area and allow it to dry. For chronic skin issues, the seed oil may also be applied in combination with the leaf paste .

Scientific Validation: The use of the plant for skin diseases is supported by its proven antimicrobial and anti-inflammatory activity against a wide range of skin pathogens and inflammatory processes .

8.4 Simple Decoction for Liver and Digestive Health

Purpose: To support liver function and treat intestinal disorders.

Preparation and Use: Take 10 grams of the dried stem bark and boil it in 500 mL of water until the volume is reduced by half. Strain the decoction and take 50 mL twice a day to support digestive health .

Scientific Validation: Traditional use as a cholagogue (promoting bile flow) and for intestinal disorders is attributed to its anti-inflammatory and antispasmodic properties .

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9. Clinical Significance and Evidence Summary

9.1 Evidence Hierarchy by Activity

Antidiabetic: Strong evidence from human clinical trials. In type-2 diabetic patients, aqueous and alcoholic extracts of flowers and leaves significantly decreased mean plasma glucose and eliminated glycosuria after two weeks of administration .

Anti-inflammatory: Strong evidence from animal studies. The 70% ethanolic leaf extract (PLE) exhibits significant anti-inflammatory activity in acute, subacute, and chronic models. It also demonstrates an excellent safety profile with no gastric ulceration .

Antimicrobial: Moderate evidence from in vitro studies. Extracts show significant activity against multiple bacterial and fungal pathogens, confirming their broad-spectrum efficacy .

Antioxidant: Moderate to strong evidence from in vitro studies. Acetone leaf extract and seed fractions show potent DPPH radical scavenging and antioxidant capacities .

Antiparasitic: Moderate evidence from in vitro and animal studies. Methanol bark extract shows strong inhibition of P. falciparum and P. berghei parasitemia in mice .

Wound Healing: Moderate evidence from traditional use and preclinical studies. The plant's ability to promote wound healing is well-documented in traditional systems and supported by its antimicrobial and anti-inflammatory actions .

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10. Safety and Toxicology

10.1 Toxicity Profile

Acute Toxicity: The 70% ethanolic extract of Pongamia pinnata leaves showed no signs of toxicity or mortality up to a high dose level of 10.125 g/kg (p.o.) in mice .

Sub-acute/Chronic Toxicity: Studies reported that extracts and single compounds did not show any significant toxicity or cause abnormality on rats' organs .

Ulcerogenic Activity: The leaf extract (PLE) was specifically tested for ulcerogenic potential. It did not produce any gastric lesions in rats, even with chronic administration, indicating it is a safe anti-inflammatory agent for the stomach .

Overall Assessment: The plant is generally considered safe for medicinal use, with a low toxicity profile towards mammalian cells . However, standardised extracts should be used with caution, and sourcing from clean environments is recommended.

10.2 Contraindications and Precautions

Pregnancy and Lactation: Insufficient safety data exists. Pregnant or nursing women should consult a healthcare provider before use.

Hypoglycaemia: Due to its potent blood-glucose-lowering effects, it may potentiate the effects of antidiabetic medications, leading to hypoglycaemia. Patients should monitor their blood sugar carefully .

Surgery: The plant should be discontinued 2 weeks prior to scheduled surgery due to its potential effects on bleeding time (antiplatelet activity).

Known Hypersensitivity: Individuals with known hypersensitivity to Pongamia pinnata or other members of the Fabaceae family should avoid use.

10.3 Potential Drug Interactions

Antidiabetic Medications (Metformin, Sulphonylureas, Insulin): Mechanism involves additive glucose-lowering effect. Clinical significance is the risk of hypoglycaemia. Recommendation: Monitor blood glucose closely and consider dose adjustment of antidiabetic medications .

Antihypertensive Medications: Mechanism involves additive vasodilatory effect. Clinical significance is the potential potentiation of hypotensive effects. Recommendation: Monitor blood pressure.

Anticoagulants and Antiplatelet Drugs (Warfarin, Aspirin): Mechanism involves compounds that may affect platelet aggregation. Clinical significance is the potential to increase bleeding risk. Recommendation: Exercise caution and monitor INR (for warfarin).

With Other Antidiabetic Herbs (Fenugreek, Gymnema): Additive glucose-lowering effect may occur. Recommendation: Monitor blood glucose and consider dose adjustment.

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11. Quality Control Parameters

11.1 Marker Compounds for Standardisation

Key compounds suitable as quality markers include Karanjin and Pongamol, the signature furanoflavonoids of the species . Karanjin content, for example, has been documented at 1.465% in seed extracts . Total phenolic and flavonoid content can also serve as functional markers .

11.2 Recommended Analytical Methods

High-performance liquid chromatography (HPLC) or High-performance thin-layer chromatography (HPTLC) are recommended for the quantification of marker compounds like Karanjin . Gas Chromatography-Mass Spectrometry (GC-MS) is ideal for profiling the seed oil's fatty acid composition . The DPPH assay and FRAP assay can serve as functional quality parameters for antioxidant activity .

11.3 Suggested Specifications

For the leaf extract, the anti-inflammatory activity should be validated, with a high safety margin (LD50 > 10 g/kg). For seed oil, a high content of unsaturated fatty acids (>70%) and a consistent level of Karanjin are desirable indicators of quality and potency .

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12. Cultivation and Sustainability

12.1 Growth Requirements

Climate: The plant thrives in tropical and subtropical climates. It can tolerate a wide temperature range (1-38°C) and annual rainfall from 500 to 2500 mm .

Habitat: It grows on a wide variety of soils, including marginal, degraded, and saline lands. It is drought-resistant and also withstands waterlogging and slight frost .

Altitude: It can be grown from sea level up to 1,200 metres elevation .

Propagation: It is easily propagated from seeds and stem cuttings .

12.2 Sustainable Harvesting

Plant parts harvested: Leaves, flowers, bark, and pods/seeds are the primary harvested parts. The high oil content in seeds (27.5%) makes it a valuable industrial crop .

Harvesting method: For seeds, pods are harvested when mature and dried. The oil is extracted by pressing. Bark and leaves can be harvested from mature trees without harming the main structure.

Season: The tree is semi-evergreen and flowers and fruits seasonally. Harvesting should be timed to ensure seed maturity.

Sustainability: Pongamia pinnata is a hardy, nitrogen-fixing tree, making it valuable for agroforestry and reforestation. Its ability to grow on marginal land with minimal inputs makes it a highly sustainable crop for both biofuel and medicinal production.

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13. Cultivar Comparison

There are no widely recognised distinct cultivars of Pongamia pinnata in the same way as some other species; however, there is variation in seed oil composition and alkaloid content depending on the genotype and geographical location. This variation influences its application for industrial versus medicinal purposes.

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14. Research Gaps and Future Directions

14.1 Critical Research Gaps

Detailed Mechanistic Studies: Further elucidation of molecular pathways is needed, particularly for its antidiabetic (beyond general glucose lowering), anti-inflammatory, and anticancer mechanisms.

Pharmacokinetics: Limited data exists on the absorption, metabolism, and bioavailability of key compounds like karanjin and pongamol. Understanding this is crucial for developing standardised formulations.

Standardised Formulations: There is a need for stable, standardised phytopharmaceutical preparations with consistent quality and efficacy.

Long-term Human Safety Data: While acute toxicity is low, comprehensive long-term human safety data (beyond 2-week clinical trials) are lacking.

Comparative Studies: More comprehensive comparative phytochemical and pharmacological profiling of different parts (bark, flowers, leaves) to understand their differential therapeutic effects.

14.2 Future Research Priorities

Diabetes: Phase II and Phase III clinical trials for antidiabetic efficacy are needed to establish optimal dosing, efficacy, and safety in larger human populations.

Inflammation: Development of topical formulations for arthritis and skin diseases based on the validated anti-inflammatory properties.

Biofuel Valorisation: Integrated research on using the high-protein seed residue (seed cake) as a value-added animal feed or for biogas production after oil extraction.

Anticancer: In vivo studies on anticancer potential are needed to validate promising preliminary results and to explore therapeutic applications.

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15. Commercial Applications

15.1 Pharmaceutical and Nutraceutical Potential

Pongamia pinnata has significant potential for development as a complementary medicine for diabetes, inflammation, and wound care. It can be developed into standardised extracts for dietary supplements and topical formulations.

15.2 Product Development

Antidiabetic Formulations: Due to strong clinical evidence, standardised powder or extracts of leaves and flowers show commercial potential for diabetes management .

Anti-inflammatory and Anti-arthritic Formulations: Karanjin-rich seed oil extracts can be developed into creams, oils, or supplements for managing arthritis and other inflammatory conditions .

Wound Healing Products: Traditional seed oil is an excellent candidate for modern wound care ointments, particularly for its antimicrobial and anti-inflammatory properties .

Biofuel and Agricultural Products: The high non-edible oil content makes it a prime source for biodiesel production .

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16. Related Plants for Further Study

Pongamia velutina: A related species of Pongamia with similar distribution and uses. It is often used interchangeably with P. pinnata in some regions.

Millettia dura: A tree species from the same tribe (Millettieae) found in Africa. It is known for its insecticidal properties and is used in traditional African medicine for similar skin conditions and parasitic infections.

Derris elliptica: Another member of the Fabaceae family, widely used as a natural insecticide due to its rotenone content. It shares the insecticidal use of Pongamia seed oil.

Psoralea corylifolia (Babchi): From the Fabaceae family, a renowned medicinal plant used for its phototoxic and skin-healing properties due to furanocoumarins. It shares the use for skin diseases (leucoderma, psoriasis) with P. pinnata.

Gmelina arborea: A tree from the Lamiaceae family, shares common uses in traditional medicine for digestive and inflammatory conditions.

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17. Reference Literature

Primary Research

· Clinical studies on leaves and flowers of Pongamia pinnata demonstrating significant hypoglycaemic activity in type-2 diabetic patients.

· Anti-inflammatory evaluation of 70% ethanolic leaf extract showing significant activity without ulcerogenic effects .

· Antioxidant and antimicrobial studies detailing the efficacy of leaf and seed extracts against various pathogens .

· Phytochemical reviews documenting the isolation of karanjin, pongamol, and numerous other flavonoids .

· Review of medicinal uses, phytochemistry, and pharmacology of Pongamia pinnata (L.) Pierre .

Key Monographs and Floras

· Indian Medicinal Plants: By K.R. Kirtikar and B.D. Basu, provides comprehensive documentation of traditional uses in India.

· Wealth of India: The Raw Materials Series by CSIR, provides comprehensive information on Indian plant resources.

· Ayurvedic Pharmacopoeia of India (API): Official monographs on plants including Karanja.

· Flora of the Presidency of Madras: By J.S. Gamble, provides detailed descriptions.

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18. Disclaimer

Pongamia pinnata is generally considered safe for moderate use, with no significant toxicity reported in studies.

This information is for educational and academic purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Pregnant or nursing women should consult a healthcare professional before use.

Individuals on medication, especially antidiabetics, antihypertensives, and anticoagulants, should consult a qualified healthcare practitioner before use.

Do not discontinue prescribed medications without consulting your doctor.

Proper identification is crucial to avoid confusion with potentially toxic species.

Always consult a qualified healthcare practitioner before using any plant for medicinal purposes.

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PREHEALING

Pongamia pinnata (Fabaceae) Karanja, Honge

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