Durian

The durian tree is a tall tropical evergreen that can reach twenty-five metres or more in the wild. Its fruit is large and heavy, covered in sharp pyramidal thorns and splitting open into segments, each of which holds several seeds wrapped in thick, creamy, aromatic pulp called an aril.

The seeds are broad ovals, roughly the size of a large olive or small plum, with a smooth, glossy brown coat. Inside, the kernel is starchy and pale. Raw seeds are not eaten, but roasted or boiled seeds are described as having a texture like a starchy nut or chestnut and a mild flavour. Seeds are not an everyday market product, and they are mostly encountered by growers, since the seedlings are used as rootstock or to raise new trees.

Durio zibethinus is native to Borneo and Sumatra and the Malay Peninsula, and has long been cultivated across tropical Southeast Asia. Wild durian trees remain in the lowland rainforests of the region, where elephants and other animals eat the fruit and disperse the seeds. Many species of Durio exist, but this is the one grown widely for the fruit trade.

The name durian comes from the Malay word duri, meaning thorn, with the suffix -an forming a noun, so it literally means the thorny thing. The species name zibethinus refers to the civet, an old Italian and Latin-derived word used by early European naturalists, who believed civet cats were drawn to the fruit or that the smell recalled civet musk.

Durian has been cultivated for centuries in what is now Malaysia, Indonesia, Thailand and the surrounding region, and the fruit features in local folk stories, markets and festivals. Early European travellers wrote about it with a mix of awe and revulsion, and the strength of its smell has become part of its legend; many hotels, public transport systems and airlines in Southeast Asia ban it outright.

The tree spread from its island homeland through trade and migration, and today it is grown in Thailand, Malaysia, Indonesia, Vietnam, the Philippines and parts of Sri Lanka, Australia and tropical America. Specific named clones such as Monthong, Musang King and D24 now support a large export trade, particularly into China, and durian is one of the most valuable tropical fruit crops of Southeast Asia.

Seeds have a more modest place in this story. In rural communities, cooked durian seeds were eaten as a snack where fruit was plentiful, boiled, roasted or fried, much as chestnuts might be. Because trees grown from seed vary a great deal in fruit quality, commercial orchards rely on grafted clones, and seeds are used mainly to raise rootstock. Agroforestry databases note this practice and also the fact that the seeds are recalcitrant, which means they lose viability quickly if dried.

The pulp is eaten fresh, or made into sweets, ice cream, cakes, pastries and the dense paste called dodol. Fermented durian is a condiment in parts of Borneo. The seeds are eaten only after cooking: they are boiled, roasted or fried, sometimes sliced thin and fried like chips, and have a starchy, nutty character.

In horticulture, durian seeds are planted fresh to grow rootstock for grafting, since they do not keep. Husks and shells are used as fuel or compost in some regions, and the wood is used locally in construction. Seeds should never be eaten raw.

Durian pulp is high in energy and provides carbohydrate, some fat, fibre, potassium, vitamin C and B vitamins. It is a nutrient-dense but calorie-rich fruit, so portions matter for people watching their energy intake. Evidence about specific health benefits is limited and mostly based on laboratory work.

There is very little reliable nutritional information on the seeds themselves, and they are not eaten in quantity, so they should be treated as an occasional traditional food rather than a supplement. Claims about medicinal effects of seeds are not supported by solid human evidence.