Betel

Botanical

What is it

Betel (Areca catechu, areca nut or 'betel nut') is the seed of the areca palm, often chewed in South and Southeast Asia, sometimes wrapped in betel leaves (Piper betle) with slaked lime. It contains the alkaloid arecoline and is a recognized carcinogen.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Mild stimulant effect (traditional use)

Mixed Evidence

Acute arecoline stimulation is real but the long-term carcinogenic and cardiovascular harms substantially outweigh any benefit.

How it works

Arecoline is a muscarinic acetylcholine receptor agonist, producing CNS stimulation, increased salivation, and a sense of mild euphoria or alertness. Chronic chewing leads to staining of teeth and oral mucosa, and the combination of areca alkaloids, lime, and tobacco (when used together) is strongly carcinogenic. Areca nut alone is classified as a Group 1 carcinogen by the International Agency for Research on Cancer. Despite its long cultural history, no legitimate dietary supplement use is recognized by mainstream Western medicine.

Dosage

There is no recommended supplement dose. Public-health guidance is to avoid chewing areca/betel nut entirely due to oral cancer risk.

When and how to take it

No legitimate supplement timing. Public-health guidance is to discontinue use.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Areca nut (chewed)

Traditional preparation; carcinogenic.

Arecoline absorbed through oral mucosa.

Safety

Areca/betel chewing causes oral submucous fibrosis, leukoplakia, and oral squamous cell carcinoma; the IARC has classified areca nut as Group 1 carcinogenic to humans. Dependence and withdrawal can occur. Acute arecoline toxicity can cause bronchospasm, bradycardia, and excessive salivation.

Who should be cautious

Avoid entirely. Particularly hazardous in pregnancy (associated with low birth weight and adverse outcomes), in anyone with asthma, cardiovascular disease, or oral/dental pathology.

Interactions

Arecoline interacts with cholinergic and anticholinergic medications, asthma medications, and CNS drugs. May affect blood glucose and antidiabetic medications.

Frequently asked questions

Is betel nut safe?⌄

No. Areca/betel nut is classified as a Group 1 carcinogen and is strongly associated with oral cancer, oral submucous fibrosis, and dependence.

Is betel leaf the same as betel nut?⌄

No. Betel leaf (Piper betle) is the wrapping plant; areca nut (Areca catechu) is the seed inside. The cancer risk is driven mainly by areca nut and any added tobacco.

References

Betel on Wikidata — Wikidata link

Betel on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Betel (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.