Betel Chewing, the Small Ritual That Links Cambodia to All of Southeast Asia

A betel leaf, a sliver of areca nut, a touch of lime paste. Nothing could look simpler — and yet this small bundle has accompanied Cambodians for generations, from the neighbourhood market to the most codified wedding ceremonies. From Cambodia to Vietnam, by way of Taiwan and southern China, betel chewing tells a story shared across a large part of Asia — and not quite the one people usually imagine.

Illustrative portrait

A Cambodian legend to explain a thousand-year-old ritual

In Cambodia, the origin of betel chewing is still told as a legend, recorded in the Collection of Khmer Tales and Legends published by the Buddhist Institute. The story follows two brothers and the wife of one of them, bound by a love and loyalty so intense that their tragic death is said to have given rise to betel, areca and lime — three elements forever linked. The king, moved by the wonder of it, is said to have decreed that this combination should from then on appear in every ceremony marking a birth, a wedding, or a death. An almost identical legend circulates on the Vietnamese side, known as Tân lang truyện — proof that this founding story travelled well beyond Khmer borders.

What stands out in both versions is the function assigned to betel from the very start: sealing a bond, marking fidelity, accompanying a passage. It's no accident that betel chewing remains, to this day, inseparable from the major milestones of Cambodian life.

In Cambodia, a required ingredient of the traditional wedding

In Khmer wedding rituals, betel isn't a folkloric detail — it's a signal. When the groom's family sends a respected go-between to visit the bride's family, it's precisely the arrival of a tray of betel leaves, areca nuts and the accessories needed to prepare the quid that traditionally announces marital intentions. Once the engagement is settled, the parents from both families chew betel together: the shared gesture stands for acceptance. The wedding itself closes with a shower of areca-palm flowers thrown over the couple — Bach Phkar Slar, in Khmer tradition.

Betel also accompanies births and funerals, tying together the three great transitions of existence — coming into the world, uniting, and leaving it — within the same ritual gesture, passed down from generation to generation.

Next door in Vietnam, where 'betel and areca' became an expression in its own right

Among Vietnamese neighbours, the phrase 'trầu cau' (betel and areca) has come to mean marriage itself in everyday language. The custom, attributed in popular tradition to the Hùng Kings, reaches far beyond the majority Kinh ethnic group: it's also found among the Tay, Nung, Dao, Thai and Muong in the north, and among Khmer and Cham populations in the Mekong Delta and the central highlands. Offering betel to a visitor remains a basic gesture of hospitality there, much like offering tea elsewhere in Asia.

Aesthetically, the practice long shaped beauty standards that are now largely forgotten: teeth lacquered black through years of regular chewing were once considered a mark of refinement among Vietnamese women — the exact opposite of the dental whiteness sought today.

Taiwan: when the chew becomes an industry... and a social phenomenon

Taiwan's case deserves particular attention, since it strays far from the ceremonial register found in Cambodia or Vietnam. There, the areca nut — locally nicknamed 'Taiwanese chewing gum' — grew over the course of the 20th century into a major agricultural industry, especially in the mountainous regions of Chiayi, Nantou and Pingtung. It was there, in 1976, at a modest stall in Nantou, that an emblematic commercial phenomenon was born: the binlang xishi, literally the 'Xi Shi of the areca nut' — a reference to a legendary beauty of ancient China — better known as 'betel nut beauties'.

The concept: young saleswomen, sometimes dressed in very brief outfits, working from brightly lit glass booths, drawing in truck drivers and motorists to buy betel quids. The phenomenon, which peaked in the 1990s, has since declined significantly — Taiwanese authorities opted not for an outright ban, which would have been economically risky for an entire agricultural sector, but for gradual regulation: stricter dress codes, anti-oral-cancer awareness campaigns, free screenings on construction sites and in industrial zones. Between 2007 and 2013, the number of Taiwanese regularly chewing areca nut is said to have dropped by 45%, according to Taiwan's Ministry of Health.

What the chew actually does

In terms of sensation, betel chewing acts as a mild stimulant, closer to strong coffee than to alcohol. Arecoline, the nut's main active compound, triggers a faster heart rate, a feeling of warmth, light sweating, and a boost of energy and alertness that lasts fifteen to thirty minutes — this jolt is exactly what explains its lasting popularity among truck drivers and manual labourers across Southeast Asia. Lime paste plays a precise chemical role of its own: it releases the areca nut's alkaloids, intensifying the effects of chewing.

Visibly, the chew heavily stains saliva and lips a characteristic red — the famous 'red smile' still associated with grandmothers in rural Vietnam or Cambodia. Chewed regularly over years, it also ends up blackening or permanently staining the teeth, an effect that was long sought after as a beauty standard in Vietnam, before becoming today more of a generational marker.

A well-documented health downside

In southern China — Hainan in particular, where areca cultivation runs deep — betel chewing likewise sits within a long timeline, blending social use with traditional pharmacopoeia. It's precisely this region, in fact, that best illustrates the current tension around the practice, caught between deep-rooted custom and growing health warnings.

These effects come with a downside, now well documented by medical research. Prolonged use is linked to oral submucous fibrosis — a progressive, painful stiffening of mouth tissue that can restrict how far the jaw opens — as well as precancerous lesions of the mucosa. The International Agency for Research on Cancer (IARC), part of the World Health Organization, classifies the areca nut as a confirmed human carcinogen, with a particularly strong statistical link to oral cancer — a risk further heightened when the chew is combined with tobacco, a common practice in certain regional preparations.

This health reality is far from a footnote: it largely explains the gradual decline of the practice across several Asian countries, including Malaysia, where betel chewing, once common, has today almost entirely disappeared.

A practice several thousand years old

Still, the historical depth of this custom commands respect. Archaeological digs in Thailand on 4,000-year-old dental remains have revealed telltale traces of areca nut chewing, while Neolithic burials at the Beinan site on Taiwan's east coast likewise show teeth marked by this ancestral practice. In other words: long before becoming a marketing pitch on the side of Taiwanese highways or a codified wedding ritual in Cambodia, betel chewing was already part of daily life across Southeast Asian societies thousands of years ago.

From social gesture to ceremonial symbol, by way of a controversial industry and now a public-health concern, betel chewing has crossed the centuries without ever quite leaving the region's daily life. In Cambodia, it continues, quietly, to seal marriage promises — long after the legend that gave rise to it was first told.