Ficus religiosa

Ficus religiosa (Sacred Fig / Peepal Tree): A Comprehensive Reference

1. Identity and Botanical Description

Nomenclature and Taxonomy

Ficus religiosa L. is the accepted scientific binomial. It is the most needed member of the Ficus species and belongs to the family Moraceae. The species epithet religiosa reflects its profound ceremonial importance: the specific epithet "religiosa" and the synonym "bodhi tree" allude to the religious significance attached to this tree. Synonyms recognized in the botanical literature include Ficus caudata Stokes, Ficus peepul Griff., and Urostigma religiosum Miq., among others.

Common vernacular names span dozens of languages and regions. It is commonly known as Peepal tree or Sacred Fig. In Ayurvedic literature it is referred to as Ashvattha (Sanskrit). In Hindi it is called "Peepal," in Tamil "Arasa Maram," and in Telugu "Raavi Chettu." The tree is also widely known as the Bodhi tree or Bo tree.

Morphology and Distribution

Ficus religiosa is an evergreen or deciduous tree consisting of dried bark from Ficus religiosa Linn. (Fam. Moraceae). It is a large perennial tree, glabrous when young, found throughout the plains of India up to 170 m altitudes in the Himalayas. It is native to the Indian subcontinent. The tree is widely cultivated in tropical and subtropical regions outside its native range and is primarily planted as an avenue and roadside tree, especially near temples.

Plant Parts Used as Medicinal Material

Various plant parts such as bark, fruit, leaves and seeds are commonly used in indigenous medicine systems. In traditional systems of medicine, various parts such as stem bark, root bark, aerial roots, vegetative buds, leaves, fruits and latex are used in diabetes, vomiting, burns, gynaecological problems, dysentery, diarrhea, nervous disorders, tonic and astringent.

Common Dosage Forms and Preparations

Preparations encountered in the traditional and experimental literature include aqueous decoctions, hydroethanolic (hydro-alcoholic) extracts, methanolic extracts, petroleum ether extracts, and the raw latex. In modern research, the material has additionally been incorporated into ointments, gels, and solid lipid nanoparticle formulations. All the plant organs, including leaves, stem bark, root, latex, and fruits, were investigated for their potential bioactivities.

2. Traditional and Historical Use

Religious and Cultural Context

It is the most sacred tree of South Asia, to both Hindus and Buddhists. It is sacred in Hinduism, Buddhism, and Jainism. Since antiquity, F. religiosa has had mythological, religious and medicinal importance in Indian culture. It is the oldest portrayed tree in India. The Atharvaveda (a sacred text of Hinduism) links it with the third heaven and discusses its medicinal properties alongside Soma and Kustha. References to F. religiosa are found in several ancient holy texts, including the Arthasastra, Puranas, Upanisads, Ramayana, Mahabharata, Bhagavadgita, and Buddhist literature.

Traditional Medical Systems

The ancient medicine systems such as Ayurveda, Siddha, Unani and Homeopathy used this tree extensively as medicine for various diseases. The therapeutic utilities of F. religiosa have been indicated in traditional systems of medicine such as Ayurveda, Unani, etc.

Ethnomedical uses of F. religiosa are recorded throughout South Asia, where it has been used for about 50 types of disorders. Various parts of these trees were used to cure diseases such as dysentery, diarrhea, diabetes, leucorrhoea, menorrhagia, nervous disorders, and as a tonic and astringent.

Part-Specific Traditional Applications

• Bark: The bark forms an important ingredient of many Ayurvedic formulations, such as "Pancha Valkaladi Tailum," an oil containing F. religiosa, Ficus benghalensis L., Ficus glomerata Roxb., Ficus infectoria Willd., and Azadirachta indica A. The bark was considered cooling, astringent, and haemostatic.
• Leaves: In traditional systems of medicine, various plant parts are used in diabetes, dysentery, seminal weakness, menorrhagia, leucorrhoea, erysipelas, nervous disorders, burning sensation, and hemorrhages, and applied topically on pimples, abscesses, wounds, ulcers, sores, cracked soles of the feet, and rheumatic inflammations.
• Latex: Its chemical constituents include tannin, saponin gluanol acetate, β-sitosterol, leucoanthocyanidin and leucoanthocyanin, which are used for the treatment of pain, inflammation, impotence, menstrual disturbances, uterine tonic and urine-related problems.
• Fruit (powdered): Traditionally used in asthma; also reported as a tonic preparation.

According to Ayurveda, F. religiosa is the most familiar herbal tree used in the management of diabetes. The rasayana property of F. religiosa is related to its potential anti-diabetic activity. (Rasayana is an Ayurvedic concept describing rejuvenating or adaptogenic properties.)

3. Phytochemistry: Key Constituents and Active Compounds

Overview of Chemical Classes

Chemical analysis showed that Ficus religiosa contained tannins, phenols, saponins, sugars, alkaloids, methionine, terpenoids, flavonoids, glycosides, proteins, separated amino acids, essential and volatile oils and steroids. Phytochemical research has led to the isolation of phytosterols, amino acids, furanocoumarins, phenolic components, hydrocarbons, aliphatic alcohols, volatile components and a few other classes of secondary metabolites from F. religiosa.

Bark Constituents

The bark of Ficus religiosa has been found to contain bergapten, bergaptol, lanosterol, β-sitosterol, stigmasterol, lupen-3-one, β-sitosterol-d-glucoside (phytosterolin), vitamin K1, tannin, wax, saponin, leucoanthocyanidin, leucoanthocyanin, leucocyanidin-3-0-β-D-glucopyrancoside, leucopelargonidin-3-0-β-D-glucopyranoside, leucopelargonidin-3-0-α-L-rhamnopyranoside, lupeol, ceryl behenate, lupeol acetate and α-amyrin acetate. About 8.7% of F. religiosa's total tannin content is found in its bark.

Leaf Constituents

Pharmacological studies found campesterol, stigmasterol, isofucosterol, α-amyrin, lupeol and different kinds of amino acids, especially in the leaf. Campesterol, α-amyrin, lupeol, tannic acid, n-nonacosane, hexacosanol, and n-octacosane are abundant in peepal leaves.

Fruit Constituents

In the fruit, tyrosine and asparagine are the common amino acids found mostly. In the fruit pulp of F. religiosa, aspartic acid, alanine, threonine, norvaline, norleucine and glycine are freely existing. The fruit is reported to contain flavanols, namely quercetin, myricetin and kaempferol. The terpenes or terpenoids present in the fruit include germacrene, α-trans bergamotene, α-terpinene, α-pinene, α-ylangene, α-humulene, α-copaene, α-thujene, β-caryophyllene, β-bourbonene, β-pinene, γ-cadinene and bicyclogermacrene.

Latex Constituents

The latex of F. religiosa contains serine proteases named Religiosin B and C. The latex also contains gluanol acetate, β-sitosterol, leucoanthocyanidin and leucoanthocyanin.

Notable Bioactive Compound Classes

• Furanocoumarins (bergapten and bergaptol): Furanocoumarin derivatives (bergapten and bergaptol), flavonoids, phenols, phytosterols, alkaloids, tannins, vitamin K, lanosterol, lupen-3-one, methyl oleanolate and steroids have been found in the aqueous extract of bark.
• Phytosterols (β-sitosterol, stigmasterol, lanosterol, lupeol): Secondary metabolites isolated from the plant such as stigmasterol, methyl oleanolate, lanosterol, caffeic acid, bergenin, amides, lupin 3-one, β-sitosterol, n-octacosanol, and flavonoids are considered to be the principal bioactive compounds of F. religiosa.
• Flavonoids (quercetin, kaempferol, myricetin): These are distributed across leaves, bark, and fruit fractions and underlie many of the antioxidant and anti-inflammatory properties attributed to the plant.
• Tannins and leucoanthocyanidins: Particularly concentrated in the bark; contribute to astringent and antimicrobial activities.
• Saponins: Present in roots and bark; the saponin-rich fraction of the root has been specifically linked to anticonvulsant activity (see below).

Most published work is limited to preliminary phytochemical characterization, antioxidant or antimicrobial assays, and ethnomedicinal documentation, while robust mechanistic studies, standardized pharmacological models, and well-designed clinical investigations remain scarce. The identified bioactive constituents—such as flavonoids, tannins, sterols, alkaloids and phenolic compounds—show potential therapeutic relevance; however, their pharmacokinetics, mechanisms of action and safety parameters are not yet fully established.

4. Proposed Mechanisms of Action

Multiple overlapping mechanisms have been proposed from in vitro and animal studies. These should not be regarded as established mechanisms in humans in the absence of human clinical data.

• Antidiabetic: Modulation of cytokine TNF-α by the aqueous extract of F. religiosa indicates that the anti-inflammatory and immunomodulatory property of the plant is related to its potential anti-diabetic activity. Additional proposed mechanisms include inhibition of carbohydrate-hydrolyzing enzymes (α-amylase, α-glucosidase) to reduce postprandial glucose, and stimulation of insulin secretion. The drug demonstrated an enzyme induction effect with respect to catalase and glutathione peroxidase activity, while it decreased exaggerated superoxide dismutase activity in type 2 diabetic rats. F. religiosa modulated enzymes of the antioxidant defence system to combat oxidative stress. As a result, glutathione (reduced form) was restored and inhibition of malondialdehyde formation was observed.
• Anticonvulsant: Inhibition of the anticonvulsant effect of extract by cyproheptadine substantiates the involvement of serotonergic pathways for the anticonvulsant activity of the extract. Additionally, the saponin-rich fraction (SRF) considerably raised monoamine levels and altered the levels of neurotransmitters (noradrenaline, serotonin, γ-aminobutyric acid, dopamine) in the brain. Researchers proposed the involvement of zinc and magnesium present in the extract in the anticonvulsant activity.
• Anti-inflammatory/Analgesic: Attenuation of pro-inflammatory mediators, possibly via inhibition of cyclooxygenase pathways and reduction of cytokine expression; attributed primarily to flavonoid and phenolic constituents.
• Hepatoprotective: Methanolic extract of Ficus religiosa produced a protective action against hepatotoxicity induced by isoniazid+rifampicin and paracetamol. The hepatoprotective role might be due to its chemical constituents including flavonoids and phenolic compounds.
• Antimicrobial: Tannins, flavonoids, and phenolic acids likely disrupt microbial cell membranes and inhibit bacterial enzyme systems, based on in vitro zone-of-inhibition studies.

5. Scientific Evidence by Area of Use

Note: The vast majority of published evidence for F. religiosa consists of in vitro (cell-based) and in vivo (animal model) studies. No well-designed, randomized, double-blind controlled human clinical trials have been identified in the peer-reviewed literature as of the available sources. Evidence is therefore preliminary and cannot be extrapolated to clinical recommendations for humans.

5.1 Endocrine System: Antidiabetic and Hypolipidemic Effects

In 1962, Brahmachari and Augusti evaluated the hypoglycemic effect of the aqueous root-bark extract of F. religiosa in male albino rabbits. The extract treatment (2.5 g/kg, oral) reduced blood glucose levels in normal and glucose-loaded rabbits.

A more recent animal study investigated the aqueous bark extract in streptozotocin (STZ)-induced diabetic rats: In the Indian traditional system of medicine, Ficus religiosa is prescribed for the treatment of diabetes mellitus. In the present study, the antidiabetic effect of the aqueous extract of Ficus religiosa bark (FRAE) was investigated in normal, glucose-loaded hyperglycemic and STZ-induced diabetic rats. Oral administration of FRAE at doses of 25, 50 and 100 mg/kg was studied. The three doses caused significant reduction in blood glucose levels in all the models. The effect was more pronounced at 50 and 100 mg/kg than at 25 mg/kg. FRAE also showed a significant increase in serum insulin, body weight and glycogen content in liver and skeletal muscle of STZ-induced diabetic rats, while there was significant reduction in the levels of serum triglyceride and total cholesterol.

A separate animal study examined the effect of the aqueous extract on the cytokine TNF-α in a neonatal STZ model of type 2 diabetes: Aqueous extract of F. religiosa at doses of 100 and 200 mg/kg was given orally for four weeks. After four weeks, fasting blood glucose, postprandial blood glucose and TNF-α in serum were analyzed. The extract at both dose levels decreased elevated glucose and TNF-α in type 2 diabetic rats. The extract at 200 mg/kg had a more pronounced effect.

Evidence strength: All antidiabetic evidence is from animal models only. No controlled human clinical trials were identified. The evidence is preliminary and cannot establish efficacy or dose in humans.

5.2 Central Nervous System: Anticonvulsant and Neuroprotective Effects

Among different biological activities on the central nervous system, F. religiosa has been reported to be used in ethnomedical treatment of epilepsy, which led researchers to further explore its anticonvulsant activity in various animal models of epilepsy.

One animal study evaluated the methanolic extract of figs (fruits) at doses of 25, 50 and 100 mg/kg (i.p.) in seizure models: Extract showed no toxicity, potentiated pentobarbitone-induced sleep and inhibited seizures induced by maximal electroshock (MES) and picrotoxin in a dose-dependent manner. The anticonvulsant effect of the extract was comparable to clinically used antiepileptic drugs (phenytoin and diazepam). However, PTZ-induced seizures were not inhibited.

Studies on the adventitious (aerial) root extract identified the saponin-rich fraction as the primary active fraction: The hydroethanolic extract of adventitious roots of Ficus religiosa has anticonvulsant activity. Retention of anticonvulsant effect in the saponins-rich fraction-treated animals indicated the role of saponins for the activity.

The saponin-rich fraction (SRF) of the hydroethanolic extract of F. religiosa roots (1, 2 and 4 mg/kg) displayed an anticonvulsant effect in mouse models of convulsions. The study was further extended to examine the effect of the SRF on cognitive decline and associated depression in a PTZ kindling mouse model of epilepsy. The extract showed marked neuroprotection in the tail suspension test.

However, memory-protective effects were not uniform: The SRF treatment failed to protect kindling-associated learning and memory impairments in the passive shock avoidance paradigm.

Previous reviews of Ficus mostly discussed traditional usages, phytochemistry and pharmacological activities, though comprehensive reviews of the neuroprotective potential of these Ficus species extracts and/or their important phytocompounds are lacking.

Evidence strength: Anticonvulsant data are derived entirely from animal (rodent) models. No human clinical trials exist. Results are consistent across several independent animal studies but cannot be directly extrapolated to humans.

5.3 Anti-inflammatory and Analgesic Effects

Fresh plant materials, crude extracts and isolated components of F. religiosa showed a wide spectrum of in vitro and in vivo pharmacological activities, including anti-inflammatory and analgesic effects. Leaf fractions have been screened in standard rodent models of pain and inflammation (hot plate, carrageenan-induced paw edema). Results from these studies, published in peer-reviewed pharmacology journals, consistently show dose-dependent anti-inflammatory and analgesic activity in rodents, attributed primarily to flavonoid and phenolic constituents.

Evidence strength: Preclinical (animal and cell-based) only. No human trials identified.

5.4 Gastrointestinal System: Anti-Ulcer Activity

To evaluate the anti-ulcer activity and acute toxicity of Ficus religiosa leaf ethanolic extract in animal models, anti-ulcer activity of the extract (250 and 500 mg/kg body weight) was studied on stress-induced models. Results in rodent models have generally been positive, consistent with the Ayurvedic use of the plant for gastric disorders.

Evidence strength: Preclinical (animal models) only. No human studies identified.

5.5 Hepatoprotective Effects

The methanolic extract of Ficus religiosa produced a protective action against the hepatotoxicity induced by isoniazid+rifampicin and paracetamol. The proposed mechanism involves antioxidant activity of flavonoids and phenolic compounds reducing oxidative stress-induced liver damage. These findings are limited to rat models.

Evidence strength: Preclinical (animal models) only. No human studies identified.

5.6 Renal (Nephroprotective) Effects

Chemical constituents of the latex, including tannin, saponin gluanol acetate, β-sitosterol, leucoanthocyanidin and leucoanthocyanin, have been examined. Findings demonstrated that F. religiosa latex and its constituents have nephroprotective and curative activities and thus have great potential as a source for natural health products. This conclusion is based on animal experiments using cisplatin-induced acute renal failure models.

Evidence strength: Preclinical (animal models) only. No human studies identified.

5.7 Antimicrobial Effects

Previous pharmacological studies revealed that Ficus religiosa possessed antimicrobial and anti-parasitic effects. Aqueous and ethanolic extracts of F. religiosa leaves have demonstrated antibacterial activity against organisms including Staphylococcus aureus, Salmonella paratyphi, and Shigella dysenteriae in disc-diffusion and broth dilution assays. The Ficus religiosa leaves showed a larger zone of inhibition in butanolic extract against Escherichia coli.

Evidence strength: In vitro only. No controlled clinical trials in humans have been identified.

5.8 Antioxidant Effects

Chemical analysis reports have shown that Ficus species contained a wide range of phytoconstituents, including phenols, flavonoids, alkaloids, tannins, saponins and terpenoids. Existing studies on pharmacological functions revealed that the observed Ficus species possessed a broad range of biological properties, including antioxidant activity. Antioxidant activity has been demonstrated through standard in vitro assays (DPPH, FRAP) and in animal models of oxidative stress-induced disease.

Evidence strength: In vitro and animal studies. No human clinical data identified.

5.9 Anticancer and Cytotoxic Effects

Cell-based (in vitro) studies have examined the cytotoxic potential of leaf extracts against cancer cell lines. FAE (acetone leaf extract) treatment significantly induced dose- and time-dependent, irreversible inhibition of breast cancer cell growth with moderate toxicity to normal breast epithelial cells. This was validated using the Sulforhodamine B assay. Interestingly, FAE accelerated cell death in a mitochondrial-dependent manner in continuous live cell imaging, indicating a possible photosensitizing effect. FAE-induced inhibition of cancer cell growth was associated with Bax translocation and mitochondria-mediated apoptosis with activation of a Caspase 9-dependent caspase cascade. FAE also possessed strong photosensitizing effect on cancer cell lines mediated through rapid mitochondrial transmembrane potential loss and partial caspase activation involving generation of intracellular ROS.

Evidence strength: In vitro (cell-line) only. These findings have no direct clinical applicability in humans in the absence of in vivo and clinical studies.

5.10 Parasympathetic Modulation

Ficus religiosa bark extract showed parasympathetic activity. The alcoholic extract of bark reduced the tone and amplitude of shrinkage in the rat ileum, guinea pig ileum, and rabbit uterus. The arterial blood pressure was reduced at 25 mg/kg of extract dose and cardio-inhibitory effects were blocked in dogs at 35 to 75 mg/kg of dose. Studies showed that there was an effect of the bark extract on parasympathetic modulation.

Evidence strength: Animal and isolated organ studies only. No human data.

6. Body Systems Associated with Ficus religiosa

Ficus religiosa L. (Moraceae) has been extensively used in traditional medicine for a wide range of ailments of the central nervous system, endocrine system, gastrointestinal tract, reproductive system, respiratory system and infectious disorders. Based on the collated experimental literature, the body systems most extensively studied include:

• Endocrine system (blood glucose regulation, lipid metabolism)
• Central nervous system (epilepsy, cognition, mood/depression in animal models)
• Gastrointestinal tract (gastric ulcer, diarrhea, dysentery)
• Hepatic system (protection against drug- and toxin-induced hepatotoxicity)
• Renal system (nephroprotection against nephrotoxic agents)
• Immune/inflammatory system (cytokine modulation, anti-inflammatory activity)
• Integumentary system (wound healing, skin diseases)
• Reproductive system (menorrhagia, leucorrhoea — traditional use only)
• Respiratory system (asthma — traditional use, limited preclinical evidence)

7. Dosage Forms and Reported Dosages in Studies

The following dosages are reported precisely as stated in the cited sources and reflect animal study doses only unless otherwise noted. They do not constitute recommendations for human use.

• Aqueous bark extract (antidiabetic, rat models): Oral administration of FRAE at doses of 25, 50 and 100 mg/kg was studied in normal, glucose-loaded and STZ-diabetic rats.
• Aqueous extract (type 2 diabetic rat model, TNF-α study): Aqueous extract of F. religiosa at a dose of 100 and 200 mg/kg was given orally for a period of four weeks.
• Aqueous root extract (anticonvulsant, rat model): Oral administration of the aqueous root extract of F. religiosa (25, 50 and 100 mg/kg) exhibited a dose-dependent anticonvulsant effect against strychnine- and PTZ-induced seizures.
• Saponin-rich fraction, adventitious root (anticonvulsant, mouse model): The saponin-rich fraction (SRF) of the hydroethanolic extract of F. religiosa roots (1, 2 and 4 mg/kg) displayed an anticonvulsant effect in mouse models of convulsions.
• Methanolic fig (fruit) extract (anticonvulsant, animal models): Anticonvulsant activity of fig extract (25, 50 and 100 mg/kg, i.p.) was studied in seizures induced by maximum electroshock (MES), picrotoxin and pentylenetetrazol (PTZ).
• Leaf ethanolic extract (anti-ulcer, animal model): Anti-ulcer activity of F. religiosa ethanolic extract (250 and 500 mg/kg body weight) was studied on stress-induced models.
• Saponin-rich fraction (PTZ kindling, mouse model): Treatment with the SRF (1, 2 and 4 mg/kg; i.p.) for 15 days in kindled mice significantly decreased seizure severity on days 5, 10 and 15.
• Bark alcoholic extract (parasympathetic modulation, animal models): The arterial blood pressure was reduced at 25 mg/kg of extract dose and cardio-inhibitory effects were blocked in dogs at 35 to 75 mg/kg of dose.
• Acute oral toxicity (rat model): In acute oral toxicity studies, Ficus religiosa extract-treated rats were observed for mortality up to 48 hours. There was no mortality or any signs of behavioral changes observed after oral administration of methanol extract up to 5000 mg/kg body weight.

8. Safety Considerations and Known Interactions

Acute Toxicity Profile (Animal Data)

In acute oral toxicity studies, the Ficus religiosa extract-treated rats were observed for mortality up to 48 hours. There was no mortality or any signs of behavioral changes observed after oral administration of methanol extract up to 5000 mg/kg body weight. This preclinical finding suggests a wide safety margin in rodents, but human safety data remain absent from the published literature.

The long history of traditional use, with no reports of any serious side effect, suggests that F. religiosa may be well tolerated in the preparations and amounts used traditionally. However, this is a qualitative assessment from a review and not equivalent to systematic human safety monitoring.

Furanocoumarin Content and Photosensitivity Risk

A notable and pharmacologically significant safety concern relates to the presence of furanocoumarins, specifically bergapten and bergaptol, in the bark. Furanocoumarins as a class are established photosensitizers. While only a few furocoumarins (principally 5-MOP and 8-MOP) have been tested extensively for photocarcinogenicity, a wider range of furocoumarins have been tested for photocytotoxicity in vitro or photoirritation in animals and humans, and for photogenotoxicity. Although this review describes the class generally, bergapten (also known as 5-methoxypsoralen) is one of the most studied members for this effect. Any preparation from F. religiosa bark containing furanocoumarins carries a theoretical risk of phototoxic or photosensitizing reactions upon UV exposure.

Latex Enzyme Content

The latex of F. religiosa contains serine proteases named Religiosin B and C. Proteolytic enzymes in plant latex are known to be capable of causing contact irritation or sensitization in susceptible individuals, though specific documented clinical cases for F. religiosa latex are not available in the sources retrieved.

Phytochemical Complexity and Unknown Interactions

Plants may contain metabolites with synergistic or antagonistic nature, and some may cause serious intoxication or hypersensitivity reactions and, in some cases, may result in anaphylactic shock. Therefore, it is crucial to evaluate the adverse and toxic effects of plant extracts and phytochemical compounds isolated, which are intended to be used for human therapy.

Most published work is limited to preliminary phytochemical characterization and ethnomedicinal documentation, while robust mechanistic studies, standardized pharmacological models, and well-designed clinical investigations remain scarce. The pharmacokinetics, mechanisms of action and safety parameters of the identified bioactive constituents are not yet fully established.

Photosensitizing Activity of Leaf Extract

Cell-line research on the leaf acetone extract noted a photosensitizing effect on cancer cell lines. Intracellular generation of reactive oxygen species (ROS) by the leaf acetone extract played a critical role in mediating apoptotic cell death and photosensitizing activity. The extent to which this photosensitizing property is relevant to topical or oral use in humans has not been studied clinically.

Gap in Human Clinical Evidence

Across all areas of pharmacological activity reviewed, no source identified a published, peer-reviewed, randomized controlled clinical trial in humans. The body of scientific evidence for F. religiosa as a whole is therefore characterized as preliminary, with a strong foundation of traditional use and a growing but non-clinical preclinical evidence base. Direct translation of animal-model dosages or outcomes to human use is scientifically unwarranted at the current stage of research.

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