Areca

Areca (Areca catechu L.): A Comprehensive Reference

1. Identity and Botanical Description

Scientific name: Areca catechu L. Family: Arecaceae (the palm family). The areca nut, also called betel nut, is the seed of a palm belonging to the areca genus (Areca catechu). The term "betel nut" is widely used but technically imprecise: the areca nut is taxonomically known as Areca catechu L. from the Arecaceae family; a common misconception is calling this nut the "betel nut," because oftentimes this nut is consumed with the "betel leaf" (paan). The two plants are botanically distinct — the betel leaf is derived from Piper betle L. (Piperaceae).

Areca catechu L. is a tropical crop belonging to the Arecaceae, which includes 181 genera and 2600 species. The tree belongs to the Arecaceae family and is native to Southeast Asia and parts of the Indian subcontinent; it can grow up to 20 meters tall, with slender trunks and feathery leaves. The palm is originally native to the Philippines, but was carried widely through the tropics by the Austronesian migrations and trade since at least 1500 BCE due to its use in betel nut chewing. It is widespread in cultivation and is considered naturalized in much of the tropical Pacific (Melanesia and Micronesia), South Asia, Southeast Asia, and parts of east Africa.

Common names and synonyms: Areca nut, betel nut, supari (India), pugua (Guam), and numerous vernacular equivalents across South, Southeast, and East Asia. Scientific synonyms include Areca cathecu Burman, Areca faufel Gaertner, Areca hortensis Loureiro, Areca himalayana H. Wendland, and Areca nigra H. Wendland.

Parts used and common forms: The primary material of commercial and medicinal interest is the seed (endosperm) of the fruit. The seed or endosperm is consumed fresh, boiled, or after sun drying or curing. It is commercially available in dried, cured, and fresh forms. In addition to the seeds, the leaves, roots, and inflorescences of the plant also present medicinal properties. In traditional medical practice, the nut may be used as a decoction, dried powder, extract, or chewed directly. It is also a component of commercial preparations such as paan (betel quid), gutka, and pan masala in South Asia.

2. Traditional and Historical Use

2.1 Geographic and Temporal Scope

Among the Arecaceae family, Areca catechu L. undeniably stands out as the most extensively employed for medicinal applications. This particular species has a rich history of traditional medicinal usage dating back to ancient times, with its prominence notably observed in the South and Southeast Asian regions. Indeed, its utilization in antiquity was frequently documented in Sanskrit medical literature and later found mention in Hindu and Buddhist historical records.

Based on linguistic evidence of how the reconstructed Proto-Austronesian term *buaq, originally meaning "fruit," came to refer to "areca nut" in Proto-Malayo-Polynesian, it is believed that betel chewing originally developed somewhere within the Philippines shortly after the beginning of the Austronesian expansion (~3000 BCE). It has been used since around 3,000 B.C in the Philippines, when a skeleton was found with betel nut-stained teeth. Archaeological evidence (skeletons with blackened teeth, areca nut remains) in Vietnam from the Phùng Nguyên, Đồng Đậu, and Đông Sơn cultures about 1500 to 1000 BC suggests that the locals knew the art of chewing the nut.

Historical Indian texts such as Vagbhata and Bhamavista describe its medicinal benefits, and its use in Indian culture can be traced back to 1300 BCE. The use of this nut has been mentioned in Sanskrit medical writings dating to the 1st century A.D. It was used as early as about A.D. 25–220 as a remedy. In the Indian subcontinent, the chewing of betel leaf and areca nut dates back to the pre-Vedic period of the Harappan Empire. Formerly in India and Sri Lanka it was a custom of the royalty to chew areca nut and betel leaf.

Areca nut has been consumed as a traditional Chinese medicinal material for more than 10,000 years, although it has recently attracted widespread attention due to potential hazards. Areca nut holds a significant position in traditional medicine in many areas and ranks first among the four southern medicines in China. As the first of China's "four southern medicines," areca nut has been added to more than 100 prescriptions to treat digestive system diseases, parasitic diseases, jaundice, and edema.

2.2 Preparations and Cultural Uses

It is thought that over 600 million people chew betel quid on a regular basis, and the practice has acquired sacred status in many cultures where it is widespread. In fact, alcohol, nicotine, and caffeine are the only psychoactive substances more common.

The most prevalent traditional preparation is the betel quid, in which the areca nut is wrapped in a betel leaf (Piper betle) together with slaked lime (calcium hydroxide). The most common configuration for chewing in Myanmar is a betel vine leaf (Piper betel), areca nut (from Areca catechu), slaked lime (calcium hydroxide) and some spices, although many betel chewers also use tobacco. Betel chewing has a very long tradition in Burma, having been practised since before the beginning of recorded history.

Chewing areca nut is thought to have a central nervous system stimulating effect and, along with this, is known to have salivary stimulating and digestive properties. According to traditional Ayurvedic medicine, chewing areca nut and betel leaf is a good remedy against halitosis. It is also used for its deworming property.

In Vietnam, areca nut acquired deep cultural significance beyond medicine: in Vietnamese, the phrase "matters of betel and areca" (chuyện trầu cau) is synonymous with marriage. The tradition of chewing areca nuts starts the talk between the groom's parents and the bride's parents about the young couple's marriage. Therefore, the leaves and juices are used ceremonially in Vietnamese weddings.

In Hindu tradition, Indian culture and tradition hold areca nut and betel leaves in high esteem. Considered an auspicious ingredient in Hinduism, the areca nut is still used along with betel leaf in religious ceremonies and also while honouring individuals in most of Southern Asia. In Papua New Guinea, where the preparation is known as buai, betel use is prolific and occurs on every street corner.

Ayurvedic texts referenced medicinal uses including: as a digestive aid, an expectorant, and an astringent. Traditional Chinese Medicine practitioners used areca nut primarily as an anthelmintic: the areca nut is a traditional medicine commonly used to kill parasites including tapeworms, lumbricus, and pinworms.

3. Phytochemistry: Key Constituents and Active Compounds

3.1 Overall Composition

Chemically, areca nut comprises approximately 0.5% alkaloids, 20% starch, 20% polyphenols, and 15% fats, among other constituents. More than 59 compounds have been isolated and identified from this plant, and pyridine-type alkaloids and condensed tannins have been identified as the characteristic constituents. The main components of the fruits of Areca catechu L. are phenols (31.1%), polysaccharides (18.7%), fat (14.0%), fiber (10.8%), and alkaloids (0.5%).

3.2 Alkaloids

Areca catechu L. is the only palm species containing alkaloids among 54 kinds of palm species. The total alkaloids in Areca catechu L. is 0.3–0.6%, which are mainly arecoline, arecaine, guvacoline, guvacine, arecolidine, homoarecoline, and isoguvacine.

The four most important alkaloids and their approximate concentrations in dried nut are: arecaidine (1.5 mg/g weight), arecoline (7.5 mg/g weight), guvacine (2.9 mg/g weight), and guvacoline (2.0 mg/g weight). However, concentrations vary with processing and ripeness: although arecoline is always the richest alkaloid in the young green areca nut extracts, the concentration of guvacine is almost three times higher than arecoline in mature areca nuts, which suggests that the contents of different alkaloids in areca nuts vary with ripeness.

Arecoline is an acid-based amphoteric compound belonging to pyridine alkaloids, which was first isolated from areca nut in 1888 by German pharmacist E. Jahns. Arecoline is the primary active ingredient responsible for the central nervous system effects of the areca nut. A LC-MS/MS analysis of processed areca nut products found high variation in alkaloid content: guvacine being the most abundant (1.39–8.16 mg/g), followed by arecoline (0.64–2.22 mg/g), arecaidine (0.14–1.70 mg/g) and guvacoline (0.17–0.99 mg/g).

The full alkaloid inventory is broader: at least 18 alkaloids have been identified in areca nut; the total alkaloid content in areca nut varies between 0.3% and 0.6%. Five new alkaloids, named arecatemines A–C and acatechu A and B, were isolated from the nuts and the dried fruit of A. catechu, respectively. However, some unknown alkaloids in areca nut may still exist, and their potential physiological activities need to be studied in future research.

The distribution of alkaloids within the nut is not uniform: in the ripened areca nut, arecoline, arecaidine, and guvacoline are segregated in the outer brown region of the nut while guvacine is segregated in the inner white region. As the major fraction of the areca alkaloids stay in the brown region of the ripened nut, it could be safer to consume the white portion of the ripened nut.

3.3 Polyphenols and Tannins

At least 12 tannins were isolated from areca nut, such as catechin and procyanidins. Tannins are polyphenol antioxidants. A diverse series of tetrameric, trimeric, and dimeric procyanidins have been separated from the seeds of A. catechu. The flavonoids isolated from A. catechu include isorhamnetin, chrysoeriol, luteolin, quercetin, 4′,5′-dihydroxy-3′,5′,7′-trimethoxyflavone, 5,7,4′-trihydroxy-3′,5′-dimethoxyflavanone, liquiritigenin, and jacareubin.

3.4 Other Constituents

Areca catechu seed contains alkaloids (arecoline, arecaine, arecaidine, guvacoline, guvacine, and choline), tannin, gallic acid, gum, and various minerals such as copper, calcium, phosphorus, and iron. Additional compounds isolated from the fruits include isorhamnetin, quercetin, liquiritigenin, (+)-catechin, resveratrol, ferulic acid, vanillic acid, β-sitosterol, and cycloartenol.

4. Mechanisms of Action

4.1 Cholinergic Activity of Arecoline

As a partial agonist of muscarinic acetylcholine receptors (mAChRs), arecoline modulates cholinergic signaling, influencing both peripheral and central nervous system (CNS) functions. Arecoline has been compared to nicotine; however, nicotine agonizes nicotinic acetylcholine receptors, whereas arecoline is primarily a partial agonist of muscarinic acetylcholine receptors, leading to its parasympathetic effects. In frogs, arecoline also acts as an antagonist (or very weak partial agonist) at α4 and α6-containing nicotinic acetylcholine receptors and as a silent antagonist at α7 nicotinic receptors, which may account for its anti-inflammatory activity. Arecoline also inhibits AMPK through generation of ROS in several types of cells.

Cholinergic compounds like arecoline can alter hippocampal function by activating muscarinic and nicotinic acetylcholine receptors (nAChRs), which are heavily involved in synaptic plasticity and memory formation. Arecoline's modulation of the hippocampus suggests its potential role in influencing learning and memory processes, which aligns with its known effects on cognitive functions in both animals and humans.

Arecoline could cross the blood–brain barrier with a brain/plasma concentration ratio close to unity.

4.2 Anthelmintic Mechanism

Arecoline is the active ingredient responsible for anthelmintic action, which can help flush the pig tapeworm, the crow tapeworm, the man-type bloodsucking worm, the liver fluke, and other parasites out of the host body by paralyzing the nervous system of these parasites. Arecoline is an old anthelmintic that has been used as a taenicide for cats, dogs, and poultry since 1921. It is isolated from the seeds of the betel nut palm, Areca catechu.

4.3 Antidepressant and Monoaminergic Activity

Injected dichloromethane of areca nut into rat brain has antidepressant properties via monoamine oxidase-A inhibition. In zebrafish, arecoline increases serotonin levels, social preference, and brain norepinephrine while reducing serotonin turnover, leading to anxiolytic effects.

4.4 Addiction Mechanism

The major active component in betel nut, arecoline, leads to addiction by modulating the cholinergic, dopaminergic, and glutamatergic systems, with the involvement of the gut-brain axis and immune-inflammatory responses. Prolonged ingestion and misuse of arecoline can result in addiction, tolerance, and dependence, facilitated by the dopamine release in the brain.

4.5 Anticancer and Genotoxic Mechanisms

Downregulation of p53, by arecoline, plays a critical role in the tumorigenesis of areca nut–associated malignancies. Arecoline is genotoxic, inducing DNA strand breaks, micronucleus formation, chromosomal aberrations, and sister-chromatid exchanges in human primary and cultured cells. The mutagenic effects of arecoline may be due to one of its major metabolites: arecoline N-oxide. The copper content of areca nut is much higher than that found in other nuts consumed by humans. Copper has been hypothesized to contribute to the fibrogenic activity of the nut. Experimental studies have implicated copper in areca nut in the causation of oral submucous fibrosis — an oral potentially malignant disorder.

5. Scientific Evidence by Area of Use

5.1 Antiparasitic / Anthelmintic Effects

Evidence type: Animal, in vitro, and limited human/veterinary models. Strength: Moderate for preclinical models; limited controlled human evidence; traditional use well-documented.

The areca nut is a traditional medicine commonly used to kill parasites including tapeworms, lumbricus, and pinworms. In laboratory settings, the combination of A. catechu and P. betle methanolic extracts demonstrated significant anthelmintic properties against Haemonchus spp. Scanning electron microscopy images revealed distinct cuticular damage resulting from the exposure to the plant combined extract that likely contributed to worm mortality. Tannins, a secondary metabolite from seeds of Areca catechu L. (Pinang seeds), have the potential as a worm medicine. One of the common functions of areca nut in Traditional Chinese Medicine is its anthelmintic function. However, research on anthelmintic efficacy in humans was cautioned recently, due to concerns about its accompanying toxicity.

5.2 Central Nervous System / Cognitive Effects

Evidence type: Small clinical reports, animal models, in vitro. Strength: Preliminary; human evidence is limited and old; findings from animal models are not yet reliably translatable to clinical use.

Arecoline enhances cognition, memory, and some behavioral disorders in patients with schizophrenia or Alzheimer's disease by activating postsynaptic muscarinic M1 receptors. Clinical administration of arecoline exhibited the potential to augment cognitive capacities and memory in patients with Alzheimer's disease. However, these findings should be interpreted as preliminary translational signals rather than evidence of an established therapeutic benefit in Alzheimer's disease or cognitive impairment.

Studies in mice have shown that low-dose arecoline can significantly increase the discrimination index (DI) of novel object recognition (NOR) and object location recognition (OLR), indicating that it can enhance physiological memory and improve memory disorders in mice. Elevated doses of arecoline can precipitate neurotoxicity, apoptosis, and carcinogenic transformation within the central nervous system. Prolonged ingestion and misuse of arecoline can result in addiction, tolerance, and dependence, facilitated by the dopamine release in the brain.

A field study in Micronesia revealed milder schizophrenia symptom scores among betel nut chewers, although the observational design and potential confounding substantially limit interpretation.

Regarding neurotoxicity at higher doses: arecoline is genotoxic and cytotoxic both in vitro and in vivo through oxidative stress-dependent mechanisms. An experimental study found that arecoline (50–200 μM) induces neuronal cell death, and catalase, NADPH oxidase inhibitors, and a caspase inhibitor can prevent arecoline-induced cell death.

5.3 Gastrointestinal / Digestive Effects

Evidence type: Preclinical and mechanistic; human data largely observational or traditional. Strength: Weak to moderate.

Chewing areca nut is known to have salivary stimulating and digestive properties. The main alkaloid in areca nut, arecoline, functions as an agonist on muscarinic acetylcholine receptors, leading to cholinergic effects in the parasympathetic nervous system. Areca nut extracts inhibit acetylcholinesterase-related activity and enhance gastrointestinal motility. At low doses, areca nut has pharmacological effects such as deworming, anti-inflammatory action, and improving gastrointestinal function.

5.4 Antidiabetic / Metabolic Effects

Evidence type: In vitro, animal, one mechanistic cell study; epidemiological data shows net adverse risk in chronic users. Strength: Very preliminary for benefits; the overall human epidemiological evidence shows increased metabolic risk with regular use.

Applying 10 µg/mL procyanidins in areca nut extract can inhibit cyclic adenosine monophosphate (cAMP)/dexamethasone-induced gluconeogenesis by 40%, related to the inhibition of the glucose-6-phosphatase (G6Pase). However, in human epidemiological data, in a meta-analysis of 17 Asian studies, betel quid chewing was found to be significantly associated with obesity (relative risk 1.47), metabolic syndrome (RR=1.51), diabetes (RR=1.47), hypertension (RR=1.45) and cardiovascular disease (RR=1.2).

A cross-sectional study (n=1,070 in Karachi, Pakistan) found: a significant positive association of raw areca nut chewing and metabolic syndrome among males (crude OR 2.74, 95% CI 1.52–4.95) and females (crude OR 3.80, 95% CI 2.32–6.20).

5.5 Lipid Metabolism / Cardiovascular

Evidence type: Animal models; human epidemiology showing harm. Strength: Preclinical (benefit) versus epidemiological (harm); the net clinical direction in chronic users is adverse.

Extracts derived from areca nut have been shown to inhibit the absorption of cholesterol in the body. Additionally, ethanol extract from areca nut has been found to reduce plasma cholesterol levels by 25% in rats fed a high-fat diet, leading to a significant reduction in the activity of intestinal pancreatic cholesterol esterase and acyl-CoA cholesterol acyltransferase A. These findings are from animal studies only.

In contrast, in human observational research: areca nut causes hyperlipidemia, vasospasm, and cardiac arrhythmias leading to an increased risk of myocardial ischemia. Arecoline interferes with the fat metabolism leading to Type II diabetes, metabolic syndromes, and deranged blood lipid levels.

5.6 Anti-inflammatory / Antioxidant Effects

Evidence type: In vitro and animal. Strength: Preliminary; no robust human clinical trials.

In RAW264.7 macrophages stimulated with LPS, areca leaf ethanol extract downregulated iNOS (inducible nitric oxide synthase), COX-2, and NF-κB (nuclear factor kappa B) while also reducing carrageenan-induced paw swelling in rats. A systematic review found a broad spectrum of pharmacological activities associated with areca nuts, including anticancer-related, antimicrobial and antiparasitic, anthelmintic, antioxidant, antihypertensive, antidiabetic, cardiometabolic and cardioprotective-related, antiaging, wound healing and gastroprotective effects, neuropharmacological, anti-inflammatory, analgesic, and other therapeutic effects. However, the evidence base for the majority of these activities in humans is absent or very limited.

5.7 Antimicrobial Effects

Evidence type: In vitro. Strength: Preliminary.

Areca catechu-derived preparations have been investigated for a broad range of antimicrobial- and antiparasitic-related activities, including antibacterial, antibiofilm, antifungal, antiviral, antimalarial, food-preservation, and plant-protective effects. These studies are largely in vitro or in animal models; no published controlled human clinical trials establish clinical antimicrobial efficacy.

6. Body Systems and Health Areas of Association

The extract derived from areca nut comprises a diverse array of constituents, including alkaloids, polyphenols, polysaccharides, and more, each of which exerts specific biological effects on the nervous system, digestive system, and circulatory system. A broader inventory of associated uses drawn from phytochemical and pharmacological literature includes: antidiabetic, stomatitis, bleeding gums, gingivitis, conjunctivitis, glaucoma, leucorrhoea, urinary disorders, anorexia, diarrhea, blood pressure regulation, antiulcerogenic, antioxidant, anticonvulsant, CNS stimulant, antifertility, oxytocic, antiviral, anthelmintic, and treatment of foul breath.

Numerous bioactive compounds have been identified in areca nuts, including alkaloids, polyphenols, polysaccharides, and fatty acids, which exhibit diverse bioactive functions, such as anti-bacterial, deworming, anti-viral, anti-oxidant, anti-inflammatory, and anti-tumor effects. Furthermore, they also display beneficial impacts targeting the nervous, digestive, and endocrine systems.

Regarding the HPA axis and sleep, arecoline has been shown to induce cortisol escape in a dexamethasone suppression model and promote REM sleep initiation in a scopolamine-sensitive manner, suggesting cholinergic and hypothalamic–pituitary–adrenal involvement.

7. Dosage Forms and Dosages Reported in Scientific Literature

No standardized pharmaceutical dose for humans has been established for medicinal use of areca nut or its extracts. The following dosages are drawn from specific studies as cited:

• Doses of 125 mg/kg and 175 mg/kg of the dichloromethane extract of areca nut significantly inhibit withdrawal symptoms in morphine-dependent mice.
• In rat primary cortical neurons, arecoline at concentrations of 50–200 μM induces neuronal cell death.
• In a gluconeogenesis inhibition study, 10 µg/mL procyanidins from areca nut extract inhibited glucose production by 40% in vitro.
• Research indicates Areca catechu has antihypertensive effects, with ACE inhibition demonstrated at doses of 100–200 mg/kg in animal models.

This interpretation is further constrained by rapid arecoline metabolism, narrow dose ranges, potential dose-dependent toxicity, broad peripheral pharmacology, and incomplete identification of the specific active constituents responsible for the observed effects.

The diversity of models, species, and doses makes it difficult to infer a single coherent therapeutic mechanism, and the relevance of high-dose anticonvulsant effects to safe pharmacological application remains uncertain.

8. Safety: Established Risks and Interactions

8.1 Carcinogenicity (Group 1 IARC)

Areca nut is carcinogenic to humans (Group 1). The Working Group noted that a common component of all betel-quid preparations is the areca nut. This evaluation is based on strong evidence that areca nut causes oral submucous fibrosis, a precancerous condition in humans, and sufficient evidence of carcinogenicity in experimental animals.

Betel quid without tobacco is now known to cause oral cancer in humans. Areca nut, a common component of all betel quid preparations, has been observed to cause oral submucous fibrosis (a pre-cancerous condition that can progress to malignant oral cancer), leading to the determination that areca nut itself is carcinogenic to humans.

In 2004, areca nut was classified as a Group 1 human carcinogen by the International Agency for Research on Cancer. Areca nut causes oral squamous cell carcinoma (OSCC) and oral potentially malignant disorders (OPMD) such as oral submucous fibrosis (OSF), oral leukoplakia (OL), oral erythroplakia (OE), and lichenoid reactions. Based on mechanistic evidence, arecoline was also classified as possibly carcinogenic to humans (group 2B) by the IARC (IARC Monographs 2021).

In the Indian subcontinent and in Taiwan, approximately half of oral cancers reported are attributed to betel quid chewing (population attributable fraction, 53.7% for residents in Taiwan and 49.5% for the Indian population). Not only is areca nut carcinogenic to humans, but in a systematic review of 11 studies, areca nut users experienced a worse prognosis than nonchewers. Second primary cancers and local recurrences were also more common.

Consumption of betel nuts is a significant oral cancer risk factor. The amount of quid ingested daily and the duration of chewing have a dose-response relationship with the risk of oral cancer.

8.2 Cardiovascular and Metabolic Risks

Areca nut causes hyperlipidemia, vasospasm, and cardiac arrhythmias leading to an increased risk of myocardial ischemia. Arecoline interferes with the fat metabolism leading to Type II diabetes, metabolic syndromes, and deranged blood lipid levels. Chronic areca nut consumption causes hypothyroidism, prostate hyperplasia, infertility, and Vitamin D deficiency.

A systematic review found that areca nut affects almost all the organs in the body and can cause or worsen conditions such as myocardial infarction, cardiac arrhythmias, hepatotoxicity, asthma, obesity, type 2 diabetes, the metabolic syndrome, hypothyroidism, infertility, and adverse reproductive outcomes.

8.3 Addiction and Dependence

Areca nut is the fourth most addictive substance used in the world, only surpassed by nicotine, alcohol, and caffeine. A study revealed that 10 out of 11 current and former heavy areca nut users reported cessation withdrawal effects such as mood swings, anxiety, irritability, reduced concentration, reduced energy, sleep disturbances, and increased appetite. They had a mean severity of dependence score of 7.3, consistent with the existence of a dependence syndrome among areca nut chewers.

8.4 Dose-Dependent Toxicity and Neurotoxicity

Areca catechu showed a dose-dependent toxicity profile; various research has been done regarding its safety analysis and it would be considered safe when administered in the prescribed dose. At elevated doses, however, elevated doses of arecoline can precipitate neurotoxicity, apoptosis, and carcinogenic transformation within the central nervous system.

In vitro experiments have shown that arecoline increases intracellular ROS levels and Ca2+ concentrations in HT22 cells (mouse hippocampal neuronal cells) in a dose-dependent manner. This stimulates endoplasmic reticulum stress (ERS) and the expression of ERS-related apoptotic proteins, resulting in cellular neurotoxicity.

8.5 Reproductive Toxicity and Other Organ Effects

Areca nut is an addictive substance consumed in many parts of the world by people of all age groups. Apart from being carcinogenic to the oral cavity, pharynx, esophagus, liver, and uterus, it has many diverse effects on the human body affecting almost all the organs. The systemic effects of areca nut are mainly due to the principal alkaloid arecoline. Arecoline has the ability to interfere with adipose cell metabolism, thereby causing metabolic syndrome disorders. It also causes bronchoconstriction and hence could affect respiratory function.

8.6 Regulatory Status

It has been well documented that the addictive and carcinogenic effect of areca nut is primarily due to its alkaloids. There are four main alkaloids in areca nut, namely arecoline, arecaidine, guvacoline, and guvacine. The difference in the levels of areca alkaloids could potentially contribute to variations in addictive and carcinogenic potential across areca nut products.

In summary, areca nut is a substance with a rich ethnopharmacological history and a documented array of pharmacological activities at the preclinical level, particularly for antiparasitic, cholinergic, and antioxidant properties. However, the IARC Group 1 classification, extensive epidemiological evidence linking habitual use to oral cancer, metabolic syndrome, cardiovascular disease, and addiction, means that its therapeutic or supplemental use carries serious, well-characterized risks that substantially outweigh current evidence of benefit in any condition where controlled human trial data are available.

References

• PubMed: Chemical constituents from the fruits of Areca catechu (2012)
• Peng W et al. (2015). Areca catechu L. (Arecaceae): A review of its traditional uses, botany, phytochemistry, pharmacology and toxicology. Journal of Ethnopharmacology, 164, 340–356.
• Ansari et al. (2021). Areca catechu: A phytopharmacological legwork. Food Frontiers.
• Pharmacological and biological activities of areca nut (Areca catechu L.): A systematic review. Journal of Food Measurement and Characterization (2026).
• PMC: Biological Effects and Biomedical Applications of Areca Nut and Its Extract (2024)
• A review of the traditional uses, pharmacology, and toxicology of areca nut. ScienceDirect (2024).
• PMC: Areca nut and its role in oral submucous fibrosis (2015)
• Wikipedia: Areca nut
• Frontiers in Integrative Neuroscience: Modulation of neural activity and gene expression by arecoline (2025)
• Wikipedia: Arecoline
• PMC: Anthelmintic effects of Areca catechu L. and Piper betle L. combination on adult Haemonchus spp. (2025)
• Evaluation of 13-week repeated oral dose toxicity of Areca catechu in F344/N rats. Food and Chemical Toxicology (2018).
• Warnakulasuriya S, Chen THH (2022). Areca Nut and Oral Cancer: Evidence from Studies Conducted in Humans. Journal of Dental Research.
• PMC: Areca Nut and Oral Cancer: Evidence from Studies Conducted in Humans (2022)
• IARC Monographs Volume 85: Betel-Quid and Areca-Nut Chewing (2004)
• WHO/IARC: Betel-quid and Areca-nut Chewing Carcinogenic to Humans (2003)
• PMC: Carcinogenic Effects of Areca Nut and Its Metabolites: A Review of the Experimental Evidence (2023)
• PMC: Comprehensive insights into areca nut: active components and omics technologies for bioactivity evaluation and quality control (2024)
• MDPI Foods: Recent Advance on Biological Activity and Toxicity of Arecoline in Edible Areca (Betel) Nut: A Review (2024)
• PubMed: Arecoline causes neurotoxicity through enhancement of oxidative stress and suppression of the antioxidant protective system (2010)
• PMC: Bioactive Components of Areca Nut: An Overview of Their Positive Impacts Targeting Different Organs (2024)
• MDPI IJMS: The Controversial Roles of Areca Nut: Medicine or Toxin? (2023)
• OAText: Chemical Components and Biological Activities of Areca catechu L.
• PMC: A review of the systemic adverse effects of areca nut or betel nut (2014)
• PMC: Effects of betel nut on cardiovascular risk factors in a rat model (2012)
• PMC: Areca Nut Chewing: Initiation, Addiction, and Harmful Effects Emphasizing the Barriers and Importance of Cessation (2021)
• PMC: Areca nut chewing and metabolic syndrome: evidence of a harmful relationship (2013)
• PMC: Potential Role of Host Microbiome in Areca Nut-Associated Carcinogenesis and Addiction (2022)
• PMC: Betel quid: New insights into an ancient addiction (2022)
• PMC: A Review of Intervention Strategies for Areca Nut Use Cessation (2023)
• PMC: Understanding betel nut addiction: a review of harmful consequences, underlying neurobiology, and emerging intervention strategies (2025)
• ScienceDirect Topics: Areca Catechu – overview