If you have ever wandered through a night market in Bangkok, Kuala Lumpur, Jakarta, or Saigon, you have likely encountered “the smell”. It is thick, heavy, and completely unforgettable. To some people, it is the scent of a sweet, almond-infused custard; these people would be considered the lucky ones. To others, it is more like a pile of onions left out in the sun.
As travellers, we love to learn and experience things that are different from home. Coming from Manchester, UK, the durian fruit is definitely a world away from our usual crab apples. Across Southeast Asia, it is famed as the “King of Fruits”. It is prized, expensive, and yet treated like a hazardous material in public spaces—a wild contradiction.
In many countries, you will find “No Durian” prohibition signs posted as frequently as “No Smoking” signs. It is famously banned from the Singapore MRT, public buses in Thailand, and the majority of hotels across the region. If you try to sneak one of these "stinky spiky devils" into your room, the lingering smell will almost certainly get you in trouble!
I have known durian from my travels; I have eaten it, felt it, and seen it many times, but I never researched exactly why it smells like it does or why it is such a massive part of Southeast Asian culture. In this article, we are going to get to the bottom of it.
Why the big stink?
The durian’s legendary odour comes from its unique genetic makeup. A landmark 2017 study published in Nature Genetics discovered that the durian genome contains about 46,000 genes—which is roughly double that of a human.
Specifically, the fruit has a "turbocharged" set of genes called methionine gamma-lyases (MGLs). These genes go into overdrive as the fruit ripens, churning out Volatile Sulphur Compounds (VSCs). These are the same types of chemicals that give garlic, onions, and even rotten eggs their pungent kick.
Key chemical culprits:
- 1-(ethylsulfanyl)ethanethiol: This provides that heavy "rotten onion" base.
- Ethyl (2S)-2-methylbutanoate: This adds a conflicting "fruity" note.
- Ethionine: A rare amino acid found in durian that acts as the precursor to its most intense smells.
The chemistry of the "stink": why durian smells like onions
When I talk about the “stink” I'm talking about a complex cocktail of over 50 different aroma compounds. Scientists have found that no specific or single chemical is responsible for the durian smell; it's actually a layer of many different smells all happening at the same time that make our brains struggle to categorise and understand what we are smelling. I'm sure someone here could make a well structured brain fart joke here.
Understanding Volatile Sulphur Compounds (VSCs)
VSCs are the reason for durians' smell. Because they are high volatile compounds, they turn into gas very easily at room temperature. This is why durian is pungent and you can smell it through the plastic wrap.
The role of thiols and the "rotten onion" effect
One of the most potent groups of chemicals in the mix are thiols. These are particularly "sticky" smells that linger on your fingers, clothes, and even the curtains of your hotel room (hence the bans!). One specific thiol, 1-(ethylsulfanyl)ethanethiol, is so strong that researchers can recreate the entire durian aroma just by mixing it with a single fruity compound.
Why durian’s scent helps it survive in the rainforest
The strong smell is not a problem for the durian tree. It is a signal designed to attract. In the wild forests of Borneo and Sumatra, being smelly is a brilliant survival strategy.
Durio zibethinus (Durian Tree)
Scientific name: Durio zibethinus
Family: Malvaceae
Native to: Malaysia, Indonesia and Borneo (widely cultivated across Southeast Asia)
The durian tree is a tall tropical evergreen that can reach 25–40 metres in height. It produces large, night-blooming flowers that are primarily pollinated by bats, a key ecological detail often overlooked.
Its fruit is among the largest tree-borne fruits in the world, typically weighing 1–3 kg, enclosed in a thick, spiny husk. The species name zibethinus refers to its powerful scent, likened historically to civet musk.
Attracting the giants
The durian depends on large animals to eat its fruit and carry its seeds to new locations. Its pungent aroma acts as a beacon call for seed-dispersers like orangutans, elephants, and even tigers. These animals have a keen sense of smell and can track a ripe fruit through the dense jungle canopy from kilometres away.
Seed dispersal as a survival strategy
Once an animal finds the fruit, they eat the creamy flesh and either spit out or poop the large seeds elsewhere. The smell ensures that the seeds don't just fall off and rot under the tree it grew on by attracting the animals to take it away, keeping the species alive. It’s interesting that a smell so many people find disgusting is the reason for these ancient trees thriving for millions of years.
The cultural divide: why one man's trash is another man's treasure
Have you ever been at the fruit stall, gagging a little bit whilst locals are lining up for a taste? It actually turns out that liking durian isn’t just about being that adventurous eater that makes youtube videos, it could actually be written in DNA.
Genetic perception: is your nose playing tricks?
Science suggests that our perception of smell is deeply linked to our genetics. You have probably heard a few people saying they don't like coriander because it tastes like soap? This is a similar thing. Some travellers are genetically predisposed to be hypersensitive to the sulphur compounds in durian.
If you have certain active OR11H7 olfactory receptors, your brain might skip the creamy, honey-like notes and go straight to "rotting garbage". For others, those same chemicals register as a complex, rewarding sweetness. It is a fascinating reminder that two people can stand in the same spot in Vietnam or Bangkok and have two completely different sensory experiences.
The "King" and the "Queen": a royal pairing
In Southeast Asian culture, food is usually about balance. Durian is considered a “heaty” fruit. This means that it is thought to warm the body and raise blood pressure, influenced by Chinese and Malay practices. It is traditionally paired with the "cooling" mangosteen.
Mangosteen is known as the “Queen of Fruits,” the juicy, acidic white segments are said to counteract the rich, heavy nature of the durian. For all you curious and cultural travellers out there this bit of folklore is a beautiful example of how people have learned to live in harmony with the intense flavours of their land.
Beyond the smell: the durian as a symbol of identity and art
At CITTRA Collective, we look past the smell to the incredible visual identity of the fruit. The durian is a masterpiece of natural engineering.
The beauty in the thorns
The word durian actually comes from the Malay word duri, which means "thorn." If you look closely at the husk, you’ll see a stunning, repetitive geometric pattern. Each thorn is a perfect pyramid, creating a rugged, defensive armor that protects the delicate gold goodness inside.
This contrast between the harsh and jagged exterior versus the soft and “heaty” interior is a recurring theme in Southeast Asian art and textiles. It represents resilience and hidden beauty, themes that we love to explore in our contemporary cultural prints. For example, in Malaysia, the "Dlongop" motif in traditional batik design specifically uses the geometry of the durian fruit and its flowers to represent local wisdom. Recently, artists have even used the imperfect, spiky form of the durian as a central sculpture in major exhibitions to symbolise the strength and perseverance of the region.
A rite of passage
For any traveller, trying durian for the first time is a rite of passage. That moment when you stop being a tourist and start to engage with a culture. Love it or hate it, it doesn't matter. The durian demands your attention. It forces you to be present in the moment, to use all of your senses and to acknowledge that the world is much more complex (and sometimes smellier) than we imagine.
Embracing the intensity of the world
The durian is more than just a smelly fruit; it is a lesson in perspective. It reminds us that nature doesn't always play by our rules and that beauty (or "stink") is in the nose of the beholder.
Next time you see those "No Durian" signs in a Jakarta hotel or a Singaporean train station, take a moment to appreciate the "King" for what it is: a bold, biological marvel that refuses to be ignored.
Durian FAQ – everything you need to know about the "King of Fruits"
What does durian actually taste like?
Describing the flavour is a challenge, as it hits both sweet and savoury notes simultaneously. Many describe it as a rich, vanilla-infused custard, but it is far more complex. A common profile is that of caramelised onions mixed with the tropical sweetness of mango, rounded off with subtle hints of banana and orange. The texture should be as smooth as heavy cream, with no fibrous crunch.
Why is durian so expensive?
Durian is expensive because it is difficult to farm and highly seasonal. Premium varieties like Musang King (Mao Shan Wang) can cost between £15 to £30 per kilogram. The price reflects the years it takes for a tree to mature and the high demand in markets like China and Singapore. In London or Manchester, imported frozen durian is often even more costly due to specialized shipping requirements.
Why does durian smell so strong?
The scent is a biological beacon call. As the fruit ripens, enzymes release volatile sulphur compounds (VSCs) and ethionine. These chemicals produce the heavy "rotten onion" or "gas" scent designed to attract seed-dispersers like orangutans and elephants through the dense rainforest canopy of Southeast Asia.
Is durian healthy or just full of fat?
While high in calories, durian is incredibly nutrient-dense. It is rich in potassium, fibre, and Vitamin C. Crucially, it contains zero cholesterol; the fats present are healthy monounsaturated fats, similar to those found in avocados. In Malaysia, it is often eaten to provide a quick energy boost.
Where is durian officially banned?
You will see "No Durian" signs across Singapore, Thailand, and Indonesia. It is strictly banned on the Singapore MRT, public buses, and in most aeroplanes. Most hotels in Bangkok and Jakarta also forbid it, as the "sticky" smell permeates air-conditioning systems and results in heavy cleaning fees.
Why is it called the "King of Fruits"?
The title was popularised by early European travellers and naturalists like Alfred Russel Wallace in the 19th century. Its "royal" status comes from its imposing size, its formidable "armour" of thorns, and its unparalleled, complex flavour profile that commands respect (and sometimes fear) in the culinary world.
How can you tell if a durian is ripe?
Locals use three main senses: Smell (a sweet fragrance near the stem), Sound (a hollow "thump" when tapped with a wooden stick), and Sight (the stem should be green and moist, not shrivelled). If the fruit has already cracked open on its own, it is likely overripe and may have begun to ferment.
Does durian cause "heaty" body temperatures?
According to Traditional Chinese Medicine and Malay folklore, durian is "heaty" (yang), meaning it can increase blood circulation and body warmth. This is why it is almost always paired with the mangosteen, the "Queen of Fruits," which provides a "cooling" (yin) effect to balance the body.
What is the most famous variety of durian?
The Musang King (Mao Shan Wang) is widely considered the gold standard for its deep yellow flesh and bittersweet, creamy taste. However, the Monthong from Thailand is the most exported variety globally due to its milder scent and thicker, sweeter pulp.
Can I take durian home to the UK as a souvenir?
Fresh durian is generally prohibited from being carried in hand luggage on international flights due to its odour. However, you can find freeze-dried durian or durian paste in airports throughout Kuala Lumpur and Saigon, which are perfectly safe (and odour-free) to bring back to Manchester or London.
Sources & further reading
To ensure this guide is as accurate as it is inspiring, I have drawn from a mix of scientific journals, official government records, and cultural archives, alongside my own first-hand experiences as a traveller. If you want to dive deeper into the "why" behind the "stink" and the beauty of the King of Fruits, these are the best places to start:
- Nature Genetics: The definitive 2017 durian genome study that mapped the 46,000 genes responsible for its unique odour.
- National Parks Board (NParks): Official botanical data on the Durio zibethinus, covering its native origins and its relationship with bat pollinators.
- National Library Board (NLB) Singapore: Comprehensive cultural records regarding the history of durian in the region and why it is famously restricted on public transport.
- Journal of Agricultural and Food Chemistry: Peer-reviewed research into Ethionine and the specific volatile sulphur compounds that create the fruit's pungent aroma.
- Encyclopaedia Britannica: Academic records covering the botanical classification and etymology of the durian and mangosteen.
- Smithsonian Magazine: Deep-dive analysis into the evolutionary biology of why the fruit developed such an intense scent to attract large mammals.
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